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Finding the Fourth Proportional to 693,402.36, 956,890.50 and 387,479.52

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Solution

The fourth proportional to 693,402.36, 956,890.50 and 387,479.52 is: 534,719.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,402.36 : 956,890.50 = 387,479.52 : x
  2. Step 2: Convert to fraction form
    693,402.36/956,890.50 = 387,479.52/x
  3. Step 3: Cross multiply
    693,402.36x = 956,890.50 × 387,479.52
  4. Step 4: Simplify right side
    693,402.36x = 370,775,471,632.56
  5. Step 5: Solve for x
    x = 370,775,471,632.56/693,402.36
  6. Step 6: Final answer
    x = 534,719.08

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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.