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Finding the Fourth Proportional to 521.52, 718.90 and 346.76

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Solution

The fourth proportional to 521.52, 718.90 and 346.76 is: 478.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.52 : 718.90 = 346.76 : x
  2. Step 2: Convert to fraction form
    521.52/718.90 = 346.76/x
  3. Step 3: Cross multiply
    521.52x = 718.90 × 346.76
  4. Step 4: Simplify right side
    521.52x = 249,285.76
  5. Step 5: Solve for x
    x = 249,285.76/521.52
  6. Step 6: Final answer
    x = 478.00

Related Problems

Find fourth proportional to 260.76, 359.45 and 173.38
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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.