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Finding the Fourth Proportional to 486,525.80, 729,788.70 and 399,045.80

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Solution

The fourth proportional to 486,525.80, 729,788.70 and 399,045.80 is: 598,568.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,525.80 : 729,788.70 = 399,045.80 : x
  2. Step 2: Convert to fraction form
    486,525.80/729,788.70 = 399,045.80/x
  3. Step 3: Cross multiply
    486,525.80x = 729,788.70 × 399,045.80
  4. Step 4: Simplify right side
    486,525.80x = 291,219,115,622.46
  5. Step 5: Solve for x
    x = 291,219,115,622.46/486,525.80
  6. Step 6: Final answer
    x = 598,568.70

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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.