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Finding the Fourth Proportional to 370,436.20, 555,654.30 and 121,143.40

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Solution

The fourth proportional to 370,436.20, 555,654.30 and 121,143.40 is: 181,715.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,436.20 : 555,654.30 = 121,143.40 : x
  2. Step 2: Convert to fraction form
    370,436.20/555,654.30 = 121,143.40/x
  3. Step 3: Cross multiply
    370,436.20x = 555,654.30 × 121,143.40
  4. Step 4: Simplify right side
    370,436.20x = 67,313,851,126.62
  5. Step 5: Solve for x
    x = 67,313,851,126.62/370,436.20
  6. Step 6: Final answer
    x = 181,715.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.