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Finding the Fourth Proportional to 544.48, 815.52 and 390.24

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Solution

The fourth proportional to 544.48, 815.52 and 390.24 is: 584.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.48 : 815.52 = 390.24 : x
  2. Step 2: Convert to fraction form
    544.48/815.52 = 390.24/x
  3. Step 3: Cross multiply
    544.48x = 815.52 × 390.24
  4. Step 4: Simplify right side
    544.48x = 318,248.52
  5. Step 5: Solve for x
    x = 318,248.52/544.48
  6. Step 6: Final answer
    x = 584.50

Related Problems

Find fourth proportional to 272.24, 407.76 and 195.12
Half scale
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Double scale
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Similar ratio
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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.