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Finding the Fourth Proportional to 485,675.40, 729,169.20 and 308,528.40

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Solution

The fourth proportional to 485,675.40, 729,169.20 and 308,528.40 is: 463,209.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,675.40 : 729,169.20 = 308,528.40 : x
  2. Step 2: Convert to fraction form
    485,675.40/729,169.20 = 308,528.40/x
  3. Step 3: Cross multiply
    485,675.40x = 729,169.20 × 308,528.40
  4. Step 4: Simplify right side
    485,675.40x = 224,969,406,605.28
  5. Step 5: Solve for x
    x = 224,969,406,605.28/485,675.40
  6. Step 6: Final answer
    x = 463,209.39

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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.