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Finding the Fourth Proportional to 530,359.07, 731,881.55 and 288,636.53

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Solution

The fourth proportional to 530,359.07, 731,881.55 and 288,636.53 is: 398,310.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,359.07 : 731,881.55 = 288,636.53 : x
  2. Step 2: Convert to fraction form
    530,359.07/731,881.55 = 288,636.53/x
  3. Step 3: Cross multiply
    530,359.07x = 731,881.55 × 288,636.53
  4. Step 4: Simplify right side
    530,359.07x = 211,247,748,025.21
  5. Step 5: Solve for x
    x = 211,247,748,025.21/530,359.07
  6. Step 6: Final answer
    x = 398,310.81

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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.