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Finding the Fourth Proportional to 291,830.40, 402,926.40 and 220,291.20

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Solution

The fourth proportional to 291,830.40, 402,926.40 and 220,291.20 is: 304,153.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,830.40 : 402,926.40 = 220,291.20 : x
  2. Step 2: Convert to fraction form
    291,830.40/402,926.40 = 220,291.20/x
  3. Step 3: Cross multiply
    291,830.40x = 402,926.40 × 220,291.20
  4. Step 4: Simplify right side
    291,830.40x = 88,761,140,167.68
  5. Step 5: Solve for x
    x = 88,761,140,167.68/291,830.40
  6. Step 6: Final answer
    x = 304,153.17

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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.