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Finding the Fourth Proportional to 391,607.08, 540,384.18 and 217,182.28

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Solution

The fourth proportional to 391,607.08, 540,384.18 and 217,182.28 is: 299,692.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,607.08 : 540,384.18 = 217,182.28 : x
  2. Step 2: Convert to fraction form
    391,607.08/540,384.18 = 217,182.28/x
  3. Step 3: Cross multiply
    391,607.08x = 540,384.18 × 217,182.28
  4. Step 4: Simplify right side
    391,607.08x = 117,361,868,288.33
  5. Step 5: Solve for x
    x = 117,361,868,288.33/391,607.08
  6. Step 6: Final answer
    x = 299,692.92

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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.