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Finding the Fourth Proportional to 885.71, 1,333.72 and 656.23

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Solution

The fourth proportional to 885.71, 1,333.72 and 656.23 is: 988.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.71 : 1,333.72 = 656.23 : x
  2. Step 2: Convert to fraction form
    885.71/1,333.72 = 656.23/x
  3. Step 3: Cross multiply
    885.71x = 1,333.72 × 656.23
  4. Step 4: Simplify right side
    885.71x = 875,223.79
  5. Step 5: Solve for x
    x = 875,223.79/885.71
  6. Step 6: Final answer
    x = 988.16

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.