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Finding the Fourth Proportional to 921.33, 1,271.25 and 585.34

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Solution

The fourth proportional to 921.33, 1,271.25 and 585.34 is: 807.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.33 : 1,271.25 = 585.34 : x
  2. Step 2: Convert to fraction form
    921.33/1,271.25 = 585.34/x
  3. Step 3: Cross multiply
    921.33x = 1,271.25 × 585.34
  4. Step 4: Simplify right side
    921.33x = 744,106.27
  5. Step 5: Solve for x
    x = 744,106.27/921.33
  6. Step 6: Final answer
    x = 807.64

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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.