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Finding the Fourth Proportional to 656.74, 984.78 and 291.10

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Solution

The fourth proportional to 656.74, 984.78 and 291.10 is: 436.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.74 : 984.78 = 291.10 : x
  2. Step 2: Convert to fraction form
    656.74/984.78 = 291.10/x
  3. Step 3: Cross multiply
    656.74x = 984.78 × 291.10
  4. Step 4: Simplify right side
    656.74x = 286,669.46
  5. Step 5: Solve for x
    x = 286,669.46/656.74
  6. Step 6: Final answer
    x = 436.50

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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.