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Finding the Fourth Proportional to 571.38, 788.70 and 440.16

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Solution

The fourth proportional to 571.38, 788.70 and 440.16 is: 607.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.38 : 788.70 = 440.16 : x
  2. Step 2: Convert to fraction form
    571.38/788.70 = 440.16/x
  3. Step 3: Cross multiply
    571.38x = 788.70 × 440.16
  4. Step 4: Simplify right side
    571.38x = 347,154.19
  5. Step 5: Solve for x
    x = 347,154.19/571.38
  6. Step 6: Final answer
    x = 607.57

Related Problems

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Half scale
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Double scale
Find fourth proportional to 572.38, 790.08 and 441.16
Similar ratio
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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.