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Finding the Fourth Proportional to 660,972.28, 912,144.14 and 359,166.20

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Solution

The fourth proportional to 660,972.28, 912,144.14 and 359,166.20 is: 495,650.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,972.28 : 912,144.14 = 359,166.20 : x
  2. Step 2: Convert to fraction form
    660,972.28/912,144.14 = 359,166.20/x
  3. Step 3: Cross multiply
    660,972.28x = 912,144.14 × 359,166.20
  4. Step 4: Simplify right side
    660,972.28x = 327,611,344,616.07
  5. Step 5: Solve for x
    x = 327,611,344,616.07/660,972.28
  6. Step 6: Final answer
    x = 495,650.66

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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.