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Finding the Fourth Proportional to 551,683.38, 761,323.68 and 309,965.76

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Solution

The fourth proportional to 551,683.38, 761,323.68 and 309,965.76 is: 427,753.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,683.38 : 761,323.68 = 309,965.76 : x
  2. Step 2: Convert to fraction form
    551,683.38/761,323.68 = 309,965.76/x
  3. Step 3: Cross multiply
    551,683.38x = 761,323.68 × 309,965.76
  4. Step 4: Simplify right side
    551,683.38x = 235,984,273,077.20
  5. Step 5: Solve for x
    x = 235,984,273,077.20/551,683.38
  6. Step 6: Final answer
    x = 427,753.09

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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.