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Finding the Fourth Proportional to 738,494.86, 1,019,123.85 and 398,963.14

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Solution

The fourth proportional to 738,494.86, 1,019,123.85 and 398,963.14 is: 550,569.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,494.86 : 1,019,123.85 = 398,963.14 : x
  2. Step 2: Convert to fraction form
    738,494.86/1,019,123.85 = 398,963.14/x
  3. Step 3: Cross multiply
    738,494.86x = 1,019,123.85 × 398,963.14
  4. Step 4: Simplify right side
    738,494.86x = 406,592,851,244.89
  5. Step 5: Solve for x
    x = 406,592,851,244.89/738,494.86
  6. Step 6: Final answer
    x = 550,569.64

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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.