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Finding the Fourth Proportional to 898.75, 1,240.25 and 500.41

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Solution

The fourth proportional to 898.75, 1,240.25 and 500.41 is: 690.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.75 : 1,240.25 = 500.41 : x
  2. Step 2: Convert to fraction form
    898.75/1,240.25 = 500.41/x
  3. Step 3: Cross multiply
    898.75x = 1,240.25 × 500.41
  4. Step 4: Simplify right side
    898.75x = 620,635.37
  5. Step 5: Solve for x
    x = 620,635.37/898.75
  6. Step 6: Final answer
    x = 690.55

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.