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Finding the Fourth Proportional to 370,306.20, 555,459.30 and 121,013.40

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Solution

The fourth proportional to 370,306.20, 555,459.30 and 121,013.40 is: 181,520.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,306.20 : 555,459.30 = 121,013.40 : x
  2. Step 2: Convert to fraction form
    370,306.20/555,459.30 = 121,013.40/x
  3. Step 3: Cross multiply
    370,306.20x = 555,459.30 × 121,013.40
  4. Step 4: Simplify right side
    370,306.20x = 67,218,018,454.62
  5. Step 5: Solve for x
    x = 67,218,018,454.62/370,306.20
  6. Step 6: Final answer
    x = 181,520.10

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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.