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Finding the Fourth Proportional to 279,490.47, 385,683.98 and 152,165.67

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Solution

The fourth proportional to 279,490.47, 385,683.98 and 152,165.67 is: 209,981.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,490.47 : 385,683.98 = 152,165.67 : x
  2. Step 2: Convert to fraction form
    279,490.47/385,683.98 = 152,165.67/x
  3. Step 3: Cross multiply
    279,490.47x = 385,683.98 × 152,165.67
  4. Step 4: Simplify right side
    279,490.47x = 58,687,860,464.14
  5. Step 5: Solve for x
    x = 58,687,860,464.14/279,490.47
  6. Step 6: Final answer
    x = 209,981.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.