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Finding the Fourth Proportional to 551,545, 761,049.19 and 309,781.26

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Solution

The fourth proportional to 551,545, 761,049.19 and 309,781.26 is: 427,451.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,545 : 761,049.19 = 309,781.26 : x
  2. Step 2: Convert to fraction form
    551,545/761,049.19 = 309,781.26/x
  3. Step 3: Cross multiply
    551,545x = 761,049.19 × 309,781.26
  4. Step 4: Simplify right side
    551,545x = 235,758,777,000.18
  5. Step 5: Solve for x
    x = 235,758,777,000.18/551,545
  6. Step 6: Final answer
    x = 427,451.57

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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.