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Finding the Fourth Proportional to 391,154.16, 539,748.10 and 219,048.20

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Solution

The fourth proportional to 391,154.16, 539,748.10 and 219,048.20 is: 302,261.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,154.16 : 539,748.10 = 219,048.20 : x
  2. Step 2: Convert to fraction form
    391,154.16/539,748.10 = 219,048.20/x
  3. Step 3: Cross multiply
    391,154.16x = 539,748.10 × 219,048.20
  4. Step 4: Simplify right side
    391,154.16x = 118,230,849,357.55
  5. Step 5: Solve for x
    x = 118,230,849,357.55/391,154.16
  6. Step 6: Final answer
    x = 302,261.51

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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.