Home / 385,116.45-531,475.20-215,350.17

Finding the Fourth Proportional to 385,116.45, 531,475.20 and 215,350.17

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Solution

The fourth proportional to 385,116.45, 531,475.20 and 215,350.17 is: 297,191.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,116.45 : 531,475.20 = 215,350.17 : x
  2. Step 2: Convert to fraction form
    385,116.45/531,475.20 = 215,350.17/x
  3. Step 3: Cross multiply
    385,116.45x = 531,475.20 × 215,350.17
  4. Step 4: Simplify right side
    385,116.45x = 114,453,274,670.78
  5. Step 5: Solve for x
    x = 114,453,274,670.78/385,116.45
  6. Step 6: Final answer
    x = 297,191.34

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1.5x scale

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.