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Finding the Fourth Proportional to 785.32, 1,179.21 and 624.35

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Solution

The fourth proportional to 785.32, 1,179.21 and 624.35 is: 937.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.32 : 1,179.21 = 624.35 : x
  2. Step 2: Convert to fraction form
    785.32/1,179.21 = 624.35/x
  3. Step 3: Cross multiply
    785.32x = 1,179.21 × 624.35
  4. Step 4: Simplify right side
    785.32x = 736,239.76
  5. Step 5: Solve for x
    x = 736,239.76/785.32
  6. Step 6: Final answer
    x = 937.50

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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.