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Finding the Fourth Proportional to 875.33, 1,313.07 and 290.31

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Solution

The fourth proportional to 875.33, 1,313.07 and 290.31 is: 435.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.33 : 1,313.07 = 290.31 : x
  2. Step 2: Convert to fraction form
    875.33/1,313.07 = 290.31/x
  3. Step 3: Cross multiply
    875.33x = 1,313.07 × 290.31
  4. Step 4: Simplify right side
    875.33x = 381,195.90
  5. Step 5: Solve for x
    x = 381,195.90/875.33
  6. Step 6: Final answer
    x = 435.49

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Half scale
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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.