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Finding the Fourth Proportional to 652,007.20, 976,698.60 and 439,430.80

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Solution

The fourth proportional to 652,007.20, 976,698.60 and 439,430.80 is: 658,261.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,007.20 : 976,698.60 = 439,430.80 : x
  2. Step 2: Convert to fraction form
    652,007.20/976,698.60 = 439,430.80/x
  3. Step 3: Cross multiply
    652,007.20x = 976,698.60 × 439,430.80
  4. Step 4: Simplify right side
    652,007.20x = 429,191,447,156.88
  5. Step 5: Solve for x
    x = 429,191,447,156.88/652,007.20
  6. Step 6: Final answer
    x = 658,261.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.