Home / 485,120,437.20-727,680,655.80-140,085,320.40

Finding the Fourth Proportional to 485,120,437.20, 727,680,655.80 and 140,085,320.40

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Solution

The fourth proportional to 485,120,437.20, 727,680,655.80 and 140,085,320.40 is: 210,127,980.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,120,437.20 : 727,680,655.80 = 140,085,320.40 : x
  2. Step 2: Convert to fraction form
    485,120,437.20/727,680,655.80 = 140,085,320.40/x
  3. Step 3: Cross multiply
    485,120,437.20x = 727,680,655.80 × 140,085,320.40
  4. Step 4: Simplify right side
    485,120,437.20x = 101,937,377,816,625,120
  5. Step 5: Solve for x
    x = 101,937,377,816,625,120/485,120,437.20
  6. Step 6: Final answer
    x = 210,127,980.60

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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.