Home / 288,979,403.40-398,791,837.42-156,820,401.20

Finding the Fourth Proportional to 288,979,403.40, 398,791,837.42 and 156,820,401.20

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Solution

The fourth proportional to 288,979,403.40, 398,791,837.42 and 156,820,401.20 is: 216,412,295.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,979,403.40 : 398,791,837.42 = 156,820,401.20 : x
  2. Step 2: Convert to fraction form
    288,979,403.40/398,791,837.42 = 156,820,401.20/x
  3. Step 3: Cross multiply
    288,979,403.40x = 398,791,837.42 × 156,820,401.20
  4. Step 4: Simplify right side
    288,979,403.40x = 62,538,695,940,094,496
  5. Step 5: Solve for x
    x = 62,538,695,940,094,496/288,979,403.40
  6. Step 6: Final answer
    x = 216,412,295.15

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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.