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Finding the Fourth Proportional to 425,439.60, 638,159.40 and 236,482.80

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Solution

The fourth proportional to 425,439.60, 638,159.40 and 236,482.80 is: 354,724.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,439.60 : 638,159.40 = 236,482.80 : x
  2. Step 2: Convert to fraction form
    425,439.60/638,159.40 = 236,482.80/x
  3. Step 3: Cross multiply
    425,439.60x = 638,159.40 × 236,482.80
  4. Step 4: Simplify right side
    425,439.60x = 150,913,721,758.32
  5. Step 5: Solve for x
    x = 150,913,721,758.32/425,439.60
  6. Step 6: Final answer
    x = 354,724.20

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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.