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Finding the Fourth Proportional to 551,542.50, 761,045.74 and 309,778.76

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Solution

The fourth proportional to 551,542.50, 761,045.74 and 309,778.76 is: 427,448.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,542.50 : 761,045.74 = 309,778.76 : x
  2. Step 2: Convert to fraction form
    551,542.50/761,045.74 = 309,778.76/x
  3. Step 3: Cross multiply
    551,542.50x = 761,045.74 × 309,778.76
  4. Step 4: Simplify right side
    551,542.50x = 235,755,801,835.25
  5. Step 5: Solve for x
    x = 235,755,801,835.25/551,542.50
  6. Step 6: Final answer
    x = 427,448.12

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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.