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Finding the Fourth Proportional to 890.16, 1,228.42 and 497.19

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Solution

The fourth proportional to 890.16, 1,228.42 and 497.19 is: 686.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.16 : 1,228.42 = 497.19 : x
  2. Step 2: Convert to fraction form
    890.16/1,228.42 = 497.19/x
  3. Step 3: Cross multiply
    890.16x = 1,228.42 × 497.19
  4. Step 4: Simplify right side
    890.16x = 610,753.66
  5. Step 5: Solve for x
    x = 610,753.66/890.16
  6. Step 6: Final answer
    x = 686.12

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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.