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Finding the Fourth Proportional to 418,412.60, 627,618.90 and 292,441.40

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Solution

The fourth proportional to 418,412.60, 627,618.90 and 292,441.40 is: 438,662.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,412.60 : 627,618.90 = 292,441.40 : x
  2. Step 2: Convert to fraction form
    418,412.60/627,618.90 = 292,441.40/x
  3. Step 3: Cross multiply
    418,412.60x = 627,618.90 × 292,441.40
  4. Step 4: Simplify right side
    418,412.60x = 183,541,749,782.46
  5. Step 5: Solve for x
    x = 183,541,749,782.46/418,412.60
  6. Step 6: Final answer
    x = 438,662.10

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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.