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Finding the Fourth Proportional to 286,920.60, 429,724.80 and 146,515.20

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Solution

The fourth proportional to 286,920.60, 429,724.80 and 146,515.20 is: 219,437.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,920.60 : 429,724.80 = 146,515.20 : x
  2. Step 2: Convert to fraction form
    286,920.60/429,724.80 = 146,515.20/x
  3. Step 3: Cross multiply
    286,920.60x = 429,724.80 × 146,515.20
  4. Step 4: Simplify right side
    286,920.60x = 62,961,215,016.96
  5. Step 5: Solve for x
    x = 62,961,215,016.96/286,920.60
  6. Step 6: Final answer
    x = 219,437.76

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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.