Home / 687,815,545.12-949,176,058.26-390,455,191.24

Finding the Fourth Proportional to 687,815,545.12, 949,176,058.26 and 390,455,191.24

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Solution

The fourth proportional to 687,815,545.12, 949,176,058.26 and 390,455,191.24 is: 538,822,831.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,815,545.12 : 949,176,058.26 = 390,455,191.24 : x
  2. Step 2: Convert to fraction form
    687,815,545.12/949,176,058.26 = 390,455,191.24/x
  3. Step 3: Cross multiply
    687,815,545.12x = 949,176,058.26 × 390,455,191.24
  4. Step 4: Simplify right side
    687,815,545.12x = 370,610,719,348,337,664
  5. Step 5: Solve for x
    x = 370,610,719,348,337,664/687,815,545.12
  6. Step 6: Final answer
    x = 538,822,831.18

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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.