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Finding the Fourth Proportional to 402,948.40, 604,422.60 and 122,429.20

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Solution

The fourth proportional to 402,948.40, 604,422.60 and 122,429.20 is: 183,643.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,948.40 : 604,422.60 = 122,429.20 : x
  2. Step 2: Convert to fraction form
    402,948.40/604,422.60 = 122,429.20/x
  3. Step 3: Cross multiply
    402,948.40x = 604,422.60 × 122,429.20
  4. Step 4: Simplify right side
    402,948.40x = 73,998,975,379.92
  5. Step 5: Solve for x
    x = 73,998,975,379.92/402,948.40
  6. Step 6: Final answer
    x = 183,643.80

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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.