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Finding the Fourth Proportional to 953.76, 1,427.76 and 542.16

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Solution

The fourth proportional to 953.76, 1,427.76 and 542.16 is: 811.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.76 : 1,427.76 = 542.16 : x
  2. Step 2: Convert to fraction form
    953.76/1,427.76 = 542.16/x
  3. Step 3: Cross multiply
    953.76x = 1,427.76 × 542.16
  4. Step 4: Simplify right side
    953.76x = 774,074.36
  5. Step 5: Solve for x
    x = 774,074.36/953.76
  6. Step 6: Final answer
    x = 811.60

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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.