Home / 500,712,942.32-690,892,495.88-288,942,516.06

Finding the Fourth Proportional to 500,712,942.32, 690,892,495.88 and 288,942,516.06

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Solution

The fourth proportional to 500,712,942.32, 690,892,495.88 and 288,942,516.06 is: 398,687,949.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,712,942.32 : 690,892,495.88 = 288,942,516.06 : x
  2. Step 2: Convert to fraction form
    500,712,942.32/690,892,495.88 = 288,942,516.06/x
  3. Step 3: Cross multiply
    500,712,942.32x = 690,892,495.88 × 288,942,516.06
  4. Step 4: Simplify right side
    500,712,942.32x = 199,628,216,086,071,872
  5. Step 5: Solve for x
    x = 199,628,216,086,071,872/500,712,942.32
  6. Step 6: Final answer
    x = 398,687,949.15

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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.