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Finding the Fourth Proportional to 580,643,139.60, 870,964,709.40 and 521,520,656.40

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Solution

The fourth proportional to 580,643,139.60, 870,964,709.40 and 521,520,656.40 is: 782,280,984.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,643,139.60 : 870,964,709.40 = 521,520,656.40 : x
  2. Step 2: Convert to fraction form
    580,643,139.60/870,964,709.40 = 521,520,656.40/x
  3. Step 3: Cross multiply
    580,643,139.60x = 870,964,709.40 × 521,520,656.40
  4. Step 4: Simplify right side
    580,643,139.60x = 454,226,086,947,523,200
  5. Step 5: Solve for x
    x = 454,226,086,947,523,200/580,643,139.60
  6. Step 6: Final answer
    x = 782,280,984.60

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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.