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Finding the Fourth Proportional to 921,939, 1,272,275.82 and 498,003

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Solution

The fourth proportional to 921,939, 1,272,275.82 and 498,003 is: 687,244.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,939 : 1,272,275.82 = 498,003 : x
  2. Step 2: Convert to fraction form
    921,939/1,272,275.82 = 498,003/x
  3. Step 3: Cross multiply
    921,939x = 1,272,275.82 × 498,003
  4. Step 4: Simplify right side
    921,939x = 633,597,175,187.46
  5. Step 5: Solve for x
    x = 633,597,175,187.46/921,939
  6. Step 6: Final answer
    x = 687,244.14

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1.5x scale

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.