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Finding the Fourth Proportional to 540.75, 746.24 and 307.88

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Solution

The fourth proportional to 540.75, 746.24 and 307.88 is: 424.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.75 : 746.24 = 307.88 : x
  2. Step 2: Convert to fraction form
    540.75/746.24 = 307.88/x
  3. Step 3: Cross multiply
    540.75x = 746.24 × 307.88
  4. Step 4: Simplify right side
    540.75x = 229,752.37
  5. Step 5: Solve for x
    x = 229,752.37/540.75
  6. Step 6: Final answer
    x = 424.88

Related Problems

Find fourth proportional to 270.38, 373.12 and 153.94
Half scale
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Double scale
Find fourth proportional to 541.75, 747.62 and 308.88
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.