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Finding the Fourth Proportional to 387,560.40, 580,988.92 and 345,570

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Solution

The fourth proportional to 387,560.40, 580,988.92 and 345,570 is: 518,041.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,560.40 : 580,988.92 = 345,570 : x
  2. Step 2: Convert to fraction form
    387,560.40/580,988.92 = 345,570/x
  3. Step 3: Cross multiply
    387,560.40x = 580,988.92 × 345,570
  4. Step 4: Simplify right side
    387,560.40x = 200,772,341,084.40
  5. Step 5: Solve for x
    x = 200,772,341,084.40/387,560.40
  6. Step 6: Final answer
    x = 518,041.42

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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.