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Finding the Fourth Proportional to 456,985.80, 685,478.70 and 157,439.70

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Solution

The fourth proportional to 456,985.80, 685,478.70 and 157,439.70 is: 236,159.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,985.80 : 685,478.70 = 157,439.70 : x
  2. Step 2: Convert to fraction form
    456,985.80/685,478.70 = 157,439.70/x
  3. Step 3: Cross multiply
    456,985.80x = 685,478.70 × 157,439.70
  4. Step 4: Simplify right side
    456,985.80x = 107,921,560,884.39
  5. Step 5: Solve for x
    x = 107,921,560,884.39/456,985.80
  6. Step 6: Final answer
    x = 236,159.55

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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.