Home / 625,428,983.34-862,733,409.90-390,071,034.42

Finding the Fourth Proportional to 625,428,983.34, 862,733,409.90 and 390,071,034.42

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Solution

The fourth proportional to 625,428,983.34, 862,733,409.90 and 390,071,034.42 is: 538,074,381.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,428,983.34 : 862,733,409.90 = 390,071,034.42 : x
  2. Step 2: Convert to fraction form
    625,428,983.34/862,733,409.90 = 390,071,034.42/x
  3. Step 3: Cross multiply
    625,428,983.34x = 862,733,409.90 × 390,071,034.42
  4. Step 4: Simplify right side
    625,428,983.34x = 336,527,313,628,386,880
  5. Step 5: Solve for x
    x = 336,527,313,628,386,880/625,428,983.34
  6. Step 6: Final answer
    x = 538,074,381.89

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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.