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Finding the Fourth Proportional to 530,390.67, 731,954.64 and 288,688.89

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Solution

The fourth proportional to 530,390.67, 731,954.64 and 288,688.89 is: 398,399.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,390.67 : 731,954.64 = 288,688.89 : x
  2. Step 2: Convert to fraction form
    530,390.67/731,954.64 = 288,688.89/x
  3. Step 3: Cross multiply
    530,390.67x = 731,954.64 × 288,688.89
  4. Step 4: Simplify right side
    530,390.67x = 211,307,175,296.78
  5. Step 5: Solve for x
    x = 211,307,175,296.78/530,390.67
  6. Step 6: Final answer
    x = 398,399.12

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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.