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Finding the Fourth Proportional to 308,140.52, 425,079.06 and 212,700.20

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Solution

The fourth proportional to 308,140.52, 425,079.06 and 212,700.20 is: 293,419.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,140.52 : 425,079.06 = 212,700.20 : x
  2. Step 2: Convert to fraction form
    308,140.52/425,079.06 = 212,700.20/x
  3. Step 3: Cross multiply
    308,140.52x = 425,079.06 × 212,700.20
  4. Step 4: Simplify right side
    308,140.52x = 90,414,401,077.81
  5. Step 5: Solve for x
    x = 90,414,401,077.81/308,140.52
  6. Step 6: Final answer
    x = 293,419.38

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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.