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Finding the Fourth Proportional to 391,143.70, 586,715.55 and 302,570.20

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Solution

The fourth proportional to 391,143.70, 586,715.55 and 302,570.20 is: 453,855.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,143.70 : 586,715.55 = 302,570.20 : x
  2. Step 2: Convert to fraction form
    391,143.70/586,715.55 = 302,570.20/x
  3. Step 3: Cross multiply
    391,143.70x = 586,715.55 × 302,570.20
  4. Step 4: Simplify right side
    391,143.70x = 177,522,641,306.61
  5. Step 5: Solve for x
    x = 177,522,641,306.61/391,143.70
  6. Step 6: Final answer
    x = 453,855.30

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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.