Home / 520,307,990.38-718,070,429.76-285,404,051.86

Finding the Fourth Proportional to 520,307,990.38, 718,070,429.76 and 285,404,051.86

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Solution

The fourth proportional to 520,307,990.38, 718,070,429.76 and 285,404,051.86 is: 393,882,496.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,307,990.38 : 718,070,429.76 = 285,404,051.86 : x
  2. Step 2: Convert to fraction form
    520,307,990.38/718,070,429.76 = 285,404,051.86/x
  3. Step 3: Cross multiply
    520,307,990.38x = 718,070,429.76 × 285,404,051.86
  4. Step 4: Simplify right side
    520,307,990.38x = 204,940,210,172,560,352
  5. Step 5: Solve for x
    x = 204,940,210,172,560,352/520,307,990.38
  6. Step 6: Final answer
    x = 393,882,496.45

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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.