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Finding the Fourth Proportional to 561,272.16, 840,563.28 and 409,061.28

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Solution

The fourth proportional to 561,272.16, 840,563.28 and 409,061.28 is: 612,611.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,272.16 : 840,563.28 = 409,061.28 : x
  2. Step 2: Convert to fraction form
    561,272.16/840,563.28 = 409,061.28/x
  3. Step 3: Cross multiply
    561,272.16x = 840,563.28 × 409,061.28
  4. Step 4: Simplify right side
    561,272.16x = 343,841,891,237.80
  5. Step 5: Solve for x
    x = 343,841,891,237.80/561,272.16
  6. Step 6: Final answer
    x = 612,611.70

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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.