Home / 625,428,966.58-862,733,386.80-390,071,017.68

Finding the Fourth Proportional to 625,428,966.58, 862,733,386.80 and 390,071,017.68

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Solution

The fourth proportional to 625,428,966.58, 862,733,386.80 and 390,071,017.68 is: 538,074,358.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,428,966.58 : 862,733,386.80 = 390,071,017.68 : x
  2. Step 2: Convert to fraction form
    625,428,966.58/862,733,386.80 = 390,071,017.68/x
  3. Step 3: Cross multiply
    625,428,966.58x = 862,733,386.80 × 390,071,017.68
  4. Step 4: Simplify right side
    625,428,966.58x = 336,527,290,175,589,056
  5. Step 5: Solve for x
    x = 336,527,290,175,589,056/625,428,966.58
  6. Step 6: Final answer
    x = 538,074,358.81

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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.