Home / 487,905.40-731,858.10-188,399.80

Finding the Fourth Proportional to 487,905.40, 731,858.10 and 188,399.80

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Solution

The fourth proportional to 487,905.40, 731,858.10 and 188,399.80 is: 282,599.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,905.40 : 731,858.10 = 188,399.80 : x
  2. Step 2: Convert to fraction form
    487,905.40/731,858.10 = 188,399.80/x
  3. Step 3: Cross multiply
    487,905.40x = 731,858.10 × 188,399.80
  4. Step 4: Simplify right side
    487,905.40x = 137,881,919,668.38
  5. Step 5: Solve for x
    x = 137,881,919,668.38/487,905.40
  6. Step 6: Final answer
    x = 282,599.70

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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.