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Finding the Fourth Proportional to 521,376.12, 782,099.68 and 166,416.86

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Solution

The fourth proportional to 521,376.12, 782,099.68 and 166,416.86 is: 249,636.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,376.12 : 782,099.68 = 166,416.86 : x
  2. Step 2: Convert to fraction form
    521,376.12/782,099.68 = 166,416.86/x
  3. Step 3: Cross multiply
    521,376.12x = 782,099.68 × 166,416.86
  4. Step 4: Simplify right side
    521,376.12x = 130,154,572,952.61
  5. Step 5: Solve for x
    x = 130,154,572,952.61/521,376.12
  6. Step 6: Final answer
    x = 249,636.62

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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.