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Finding the Fourth Proportional to 551,564.88, 761,118.54 and 309,887.68

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Solution

The fourth proportional to 551,564.88, 761,118.54 and 309,887.68 is: 427,621.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,564.88 : 761,118.54 = 309,887.68 : x
  2. Step 2: Convert to fraction form
    551,564.88/761,118.54 = 309,887.68/x
  3. Step 3: Cross multiply
    551,564.88x = 761,118.54 × 309,887.68
  4. Step 4: Simplify right side
    551,564.88x = 235,861,258,565.59
  5. Step 5: Solve for x
    x = 235,861,258,565.59/551,564.88
  6. Step 6: Final answer
    x = 427,621.97

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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.