Home / 720,980,989.20-1,081,471,483.80-478,643,893.20

Finding the Fourth Proportional to 720,980,989.20, 1,081,471,483.80 and 478,643,893.20

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Solution

The fourth proportional to 720,980,989.20, 1,081,471,483.80 and 478,643,893.20 is: 717,965,839.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,980,989.20 : 1,081,471,483.80 = 478,643,893.20 : x
  2. Step 2: Convert to fraction form
    720,980,989.20/1,081,471,483.80 = 478,643,893.20/x
  3. Step 3: Cross multiply
    720,980,989.20x = 1,081,471,483.80 × 478,643,893.20
  4. Step 4: Simplify right side
    720,980,989.20x = 517,639,721,390,812,672
  5. Step 5: Solve for x
    x = 517,639,721,390,812,672/720,980,989.20
  6. Step 6: Final answer
    x = 717,965,839.80

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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.