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Finding the Fourth Proportional to 364,839.80, 547,259.70 and 128,206.40

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Solution

The fourth proportional to 364,839.80, 547,259.70 and 128,206.40 is: 192,309.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    364,839.80 : 547,259.70 = 128,206.40 : x
  2. Step 2: Convert to fraction form
    364,839.80/547,259.70 = 128,206.40/x
  3. Step 3: Cross multiply
    364,839.80x = 547,259.70 × 128,206.40
  4. Step 4: Simplify right side
    364,839.80x = 70,162,196,002.08
  5. Step 5: Solve for x
    x = 70,162,196,002.08/364,839.80
  6. Step 6: Final answer
    x = 192,309.60

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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.