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Finding the Fourth Proportional to 345,989.80, 518,802.99 and 156,286.72

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Solution

The fourth proportional to 345,989.80, 518,802.99 and 156,286.72 is: 234,348.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,989.80 : 518,802.99 = 156,286.72 : x
  2. Step 2: Convert to fraction form
    345,989.80/518,802.99 = 156,286.72/x
  3. Step 3: Cross multiply
    345,989.80x = 518,802.99 × 156,286.72
  4. Step 4: Simplify right side
    345,989.80x = 81,082,017,633.29
  5. Step 5: Solve for x
    x = 81,082,017,633.29/345,989.80
  6. Step 6: Final answer
    x = 234,348.00

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1.5x scale

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.