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Finding the Fourth Proportional to 528,942, 793,411.36 and 191,982.20

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Solution

The fourth proportional to 528,942, 793,411.36 and 191,982.20 is: 287,972.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,942 : 793,411.36 = 191,982.20 : x
  2. Step 2: Convert to fraction form
    528,942/793,411.36 = 191,982.20/x
  3. Step 3: Cross multiply
    528,942x = 793,411.36 × 191,982.20
  4. Step 4: Simplify right side
    528,942x = 152,320,858,397.79
  5. Step 5: Solve for x
    x = 152,320,858,397.79/528,942
  6. Step 6: Final answer
    x = 287,972.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.