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Finding the Fourth Proportional to 572,539.40, 858,809.10 and 257,611.40

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Solution

The fourth proportional to 572,539.40, 858,809.10 and 257,611.40 is: 386,417.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,539.40 : 858,809.10 = 257,611.40 : x
  2. Step 2: Convert to fraction form
    572,539.40/858,809.10 = 257,611.40/x
  3. Step 3: Cross multiply
    572,539.40x = 858,809.10 × 257,611.40
  4. Step 4: Simplify right side
    572,539.40x = 221,239,014,583.74
  5. Step 5: Solve for x
    x = 221,239,014,583.74/572,539.40
  6. Step 6: Final answer
    x = 386,417.10

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.