Home / 719,874,734.20-993,422,187.42-389,842,320.76

Finding the Fourth Proportional to 719,874,734.20, 993,422,187.42 and 389,842,320.76

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Solution

The fourth proportional to 719,874,734.20, 993,422,187.42 and 389,842,320.76 is: 537,979,724.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,874,734.20 : 993,422,187.42 = 389,842,320.76 : x
  2. Step 2: Convert to fraction form
    719,874,734.20/993,422,187.42 = 389,842,320.76/x
  3. Step 3: Cross multiply
    719,874,734.20x = 993,422,187.42 × 389,842,320.76
  4. Step 4: Simplify right side
    719,874,734.20x = 387,278,011,038,288,448
  5. Step 5: Solve for x
    x = 387,278,011,038,288,448/719,874,734.20
  6. Step 6: Final answer
    x = 537,979,724.30

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.