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Finding the Fourth Proportional to 611,583.90, 917,047.80 and 256,196.40

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Solution

The fourth proportional to 611,583.90, 917,047.80 and 256,196.40 is: 384,157.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,583.90 : 917,047.80 = 256,196.40 : x
  2. Step 2: Convert to fraction form
    611,583.90/917,047.80 = 256,196.40/x
  3. Step 3: Cross multiply
    611,583.90x = 917,047.80 × 256,196.40
  4. Step 4: Simplify right side
    611,583.90x = 234,944,344,987.92
  5. Step 5: Solve for x
    x = 234,944,344,987.92/611,583.90
  6. Step 6: Final answer
    x = 384,157.18

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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.