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Finding the Fourth Proportional to 942.68, 1,300.56 and 528.68

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Solution

The fourth proportional to 942.68, 1,300.56 and 528.68 is: 729.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.68 : 1,300.56 = 528.68 : x
  2. Step 2: Convert to fraction form
    942.68/1,300.56 = 528.68/x
  3. Step 3: Cross multiply
    942.68x = 1,300.56 × 528.68
  4. Step 4: Simplify right side
    942.68x = 687,580.06
  5. Step 5: Solve for x
    x = 687,580.06/942.68
  6. Step 6: Final answer
    x = 729.39

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.