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Finding the Fourth Proportional to 1,531.19, 2,296.74 and 665.50

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Solution

The fourth proportional to 1,531.19, 2,296.74 and 665.50 is: 998.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.19 : 2,296.74 = 665.50 : x
  2. Step 2: Convert to fraction form
    1,531.19/2,296.74 = 665.50/x
  3. Step 3: Cross multiply
    1,531.19x = 2,296.74 × 665.50
  4. Step 4: Simplify right side
    1,531.19x = 1,528,480.47
  5. Step 5: Solve for x
    x = 1,528,480.47/1,531.19
  6. Step 6: Final answer
    x = 998.23

Related Problems

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Double scale
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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.