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Finding the Fourth Proportional to 572.70, 857.70 and 328.76

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Solution

The fourth proportional to 572.70, 857.70 and 328.76 is: 492.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.70 : 857.70 = 328.76 : x
  2. Step 2: Convert to fraction form
    572.70/857.70 = 328.76/x
  3. Step 3: Cross multiply
    572.70x = 857.70 × 328.76
  4. Step 4: Simplify right side
    572.70x = 281,973.16
  5. Step 5: Solve for x
    x = 281,973.16/572.70
  6. Step 6: Final answer
    x = 492.36

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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.