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Finding the Fourth Proportional to 612,813.60, 919,220.40 and 585,257.40

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Solution

The fourth proportional to 612,813.60, 919,220.40 and 585,257.40 is: 877,886.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,813.60 : 919,220.40 = 585,257.40 : x
  2. Step 2: Convert to fraction form
    612,813.60/919,220.40 = 585,257.40/x
  3. Step 3: Cross multiply
    612,813.60x = 919,220.40 × 585,257.40
  4. Step 4: Simplify right side
    612,813.60x = 537,980,541,330.96
  5. Step 5: Solve for x
    x = 537,980,541,330.96/612,813.60
  6. Step 6: Final answer
    x = 877,886.10

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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.