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Finding the Fourth Proportional to 489,123.15, 733,684.73 and 431,386.35

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Solution

The fourth proportional to 489,123.15, 733,684.73 and 431,386.35 is: 647,079.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,123.15 : 733,684.73 = 431,386.35 : x
  2. Step 2: Convert to fraction form
    489,123.15/733,684.73 = 431,386.35/x
  3. Step 3: Cross multiply
    489,123.15x = 733,684.73 × 431,386.35
  4. Step 4: Simplify right side
    489,123.15x = 316,501,575,568.50
  5. Step 5: Solve for x
    x = 316,501,575,568.50/489,123.15
  6. Step 6: Final answer
    x = 647,079.53

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Similar ratio
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1.5x scale

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.