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Finding the Fourth Proportional to 356,395.36, 491,638.98 and 220,385.92

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Solution

The fourth proportional to 356,395.36, 491,638.98 and 220,385.92 is: 304,017.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,395.36 : 491,638.98 = 220,385.92 : x
  2. Step 2: Convert to fraction form
    356,395.36/491,638.98 = 220,385.92/x
  3. Step 3: Cross multiply
    356,395.36x = 491,638.98 × 220,385.92
  4. Step 4: Simplify right side
    356,395.36x = 108,350,308,915.16
  5. Step 5: Solve for x
    x = 108,350,308,915.16/356,395.36
  6. Step 6: Final answer
    x = 304,017.17

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1.5x scale

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.