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Finding the Fourth Proportional to 528,505.43, 729,333.79 and 286,781.85

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Solution

The fourth proportional to 528,505.43, 729,333.79 and 286,781.85 is: 395,756.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,505.43 : 729,333.79 = 286,781.85 : x
  2. Step 2: Convert to fraction form
    528,505.43/729,333.79 = 286,781.85/x
  3. Step 3: Cross multiply
    528,505.43x = 729,333.79 × 286,781.85
  4. Step 4: Simplify right side
    528,505.43x = 209,159,692,846.76
  5. Step 5: Solve for x
    x = 209,159,692,846.76/528,505.43
  6. Step 6: Final answer
    x = 395,756.95

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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.