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Finding the Fourth Proportional to 530,141.88, 731,316.96 and 315,129

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Solution

The fourth proportional to 530,141.88, 731,316.96 and 315,129 is: 434,712.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,141.88 : 731,316.96 = 315,129 : x
  2. Step 2: Convert to fraction form
    530,141.88/731,316.96 = 315,129/x
  3. Step 3: Cross multiply
    530,141.88x = 731,316.96 × 315,129
  4. Step 4: Simplify right side
    530,141.88x = 230,459,182,287.84
  5. Step 5: Solve for x
    x = 230,459,182,287.84/530,141.88
  6. Step 6: Final answer
    x = 434,712.27

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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.