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Finding the Fourth Proportional to 624.77, 862.18 and 345.00

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Solution

The fourth proportional to 624.77, 862.18 and 345.00 is: 476.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.77 : 862.18 = 345.00 : x
  2. Step 2: Convert to fraction form
    624.77/862.18 = 345.00/x
  3. Step 3: Cross multiply
    624.77x = 862.18 × 345.00
  4. Step 4: Simplify right side
    624.77x = 297,447.79
  5. Step 5: Solve for x
    x = 297,447.79/624.77
  6. Step 6: Final answer
    x = 476.10

Related Problems

Find fourth proportional to 312.38, 431.09 and 172.50
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.