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Finding the Fourth Proportional to 662,605.20, 914,391.72 and 372,176.40

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Solution

The fourth proportional to 662,605.20, 914,391.72 and 372,176.40 is: 513,601.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,605.20 : 914,391.72 = 372,176.40 : x
  2. Step 2: Convert to fraction form
    662,605.20/914,391.72 = 372,176.40/x
  3. Step 3: Cross multiply
    662,605.20x = 914,391.72 × 372,176.40
  4. Step 4: Simplify right side
    662,605.20x = 340,315,018,539.41
  5. Step 5: Solve for x
    x = 340,315,018,539.41/662,605.20
  6. Step 6: Final answer
    x = 513,601.49

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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.