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Finding the Fourth Proportional to 617.57, 850.78 and 430.72

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Solution

The fourth proportional to 617.57, 850.78 and 430.72 is: 593.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.57 : 850.78 = 430.72 : x
  2. Step 2: Convert to fraction form
    617.57/850.78 = 430.72/x
  3. Step 3: Cross multiply
    617.57x = 850.78 × 430.72
  4. Step 4: Simplify right side
    617.57x = 366,444.76
  5. Step 5: Solve for x
    x = 366,444.76/617.57
  6. Step 6: Final answer
    x = 593.37

Related Problems

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Half scale
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Double scale
Find fourth proportional to 618.57, 852.16 and 431.72
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.