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Finding the Fourth Proportional to 390,614.69, 539,063.63 and 229,468.32

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Solution

The fourth proportional to 390,614.69, 539,063.63 and 229,468.32 is: 316,675.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,614.69 : 539,063.63 = 229,468.32 : x
  2. Step 2: Convert to fraction form
    390,614.69/539,063.63 = 229,468.32/x
  3. Step 3: Cross multiply
    390,614.69x = 539,063.63 × 229,468.32
  4. Step 4: Simplify right side
    390,614.69x = 123,698,024,401.86
  5. Step 5: Solve for x
    x = 123,698,024,401.86/390,614.69
  6. Step 6: Final answer
    x = 316,675.30

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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.