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Finding the Fourth Proportional to 291,657.80, 402,487.80 and 157,521.80

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Solution

The fourth proportional to 291,657.80, 402,487.80 and 157,521.80 is: 217,380.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,657.80 : 402,487.80 = 157,521.80 : x
  2. Step 2: Convert to fraction form
    291,657.80/402,487.80 = 157,521.80/x
  3. Step 3: Cross multiply
    291,657.80x = 402,487.80 × 157,521.80
  4. Step 4: Simplify right side
    291,657.80x = 63,400,602,734.04
  5. Step 5: Solve for x
    x = 63,400,602,734.04/291,657.80
  6. Step 6: Final answer
    x = 217,380.10

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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.