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Finding the Fourth Proportional to 551,641.58, 761,223.87 and 309,876.93

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Solution

The fourth proportional to 551,641.58, 761,223.87 and 309,876.93 is: 427,606.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,641.58 : 761,223.87 = 309,876.93 : x
  2. Step 2: Convert to fraction form
    551,641.58/761,223.87 = 309,876.93/x
  3. Step 3: Cross multiply
    551,641.58x = 761,223.87 × 309,876.93
  4. Step 4: Simplify right side
    551,641.58x = 235,885,715,878.32
  5. Step 5: Solve for x
    x = 235,885,715,878.32/551,641.58
  6. Step 6: Final answer
    x = 427,606.85

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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.