Home / 625,428,981.45-862,733,407.32-390,071,032.56

Finding the Fourth Proportional to 625,428,981.45, 862,733,407.32 and 390,071,032.56

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Solution

The fourth proportional to 625,428,981.45, 862,733,407.32 and 390,071,032.56 is: 538,074,379.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,428,981.45 : 862,733,407.32 = 390,071,032.56 : x
  2. Step 2: Convert to fraction form
    625,428,981.45/862,733,407.32 = 390,071,032.56/x
  3. Step 3: Cross multiply
    625,428,981.45x = 862,733,407.32 × 390,071,032.56
  4. Step 4: Simplify right side
    625,428,981.45x = 336,527,311,017,319,488
  5. Step 5: Solve for x
    x = 336,527,311,017,319,488/625,428,981.45
  6. Step 6: Final answer
    x = 538,074,379.34

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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.