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Finding the Fourth Proportional to 880,458.60, 1,320,104.70 and 319,420.20

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Solution

The fourth proportional to 880,458.60, 1,320,104.70 and 319,420.20 is: 478,918.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,458.60 : 1,320,104.70 = 319,420.20 : x
  2. Step 2: Convert to fraction form
    880,458.60/1,320,104.70 = 319,420.20/x
  3. Step 3: Cross multiply
    880,458.60x = 1,320,104.70 × 319,420.20
  4. Step 4: Simplify right side
    880,458.60x = 421,668,107,294.94
  5. Step 5: Solve for x
    x = 421,668,107,294.94/880,458.60
  6. Step 6: Final answer
    x = 478,918.72

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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.