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Finding the Fourth Proportional to 310,384.80, 428,299.11 and 174,397.14

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Solution

The fourth proportional to 310,384.80, 428,299.11 and 174,397.14 is: 240,650.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,384.80 : 428,299.11 = 174,397.14 : x
  2. Step 2: Convert to fraction form
    310,384.80/428,299.11 = 174,397.14/x
  3. Step 3: Cross multiply
    310,384.80x = 428,299.11 × 174,397.14
  4. Step 4: Simplify right side
    310,384.80x = 74,694,139,848.55
  5. Step 5: Solve for x
    x = 74,694,139,848.55/310,384.80
  6. Step 6: Final answer
    x = 240,650.12

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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.