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Finding the Fourth Proportional to 487,936.40, 731,904.60 and 188,430.80

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Solution

The fourth proportional to 487,936.40, 731,904.60 and 188,430.80 is: 282,646.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,936.40 : 731,904.60 = 188,430.80 : x
  2. Step 2: Convert to fraction form
    487,936.40/731,904.60 = 188,430.80/x
  3. Step 3: Cross multiply
    487,936.40x = 731,904.60 × 188,430.80
  4. Step 4: Simplify right side
    487,936.40x = 137,913,369,301.68
  5. Step 5: Solve for x
    x = 137,913,369,301.68/487,936.40
  6. Step 6: Final answer
    x = 282,646.20

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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.