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Finding the Fourth Proportional to 385,682.80, 578,524.20 and 136,332.40

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Solution

The fourth proportional to 385,682.80, 578,524.20 and 136,332.40 is: 204,498.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,682.80 : 578,524.20 = 136,332.40 : x
  2. Step 2: Convert to fraction form
    385,682.80/578,524.20 = 136,332.40/x
  3. Step 3: Cross multiply
    385,682.80x = 578,524.20 × 136,332.40
  4. Step 4: Simplify right side
    385,682.80x = 78,871,592,644.08
  5. Step 5: Solve for x
    x = 78,871,592,644.08/385,682.80
  6. Step 6: Final answer
    x = 204,498.60

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Similar ratio
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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.