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Finding the Fourth Proportional to 651.72, 899.22 and 476.76

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Solution

The fourth proportional to 651.72, 899.22 and 476.76 is: 657.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.72 : 899.22 = 476.76 : x
  2. Step 2: Convert to fraction form
    651.72/899.22 = 476.76/x
  3. Step 3: Cross multiply
    651.72x = 899.22 × 476.76
  4. Step 4: Simplify right side
    651.72x = 428,712.13
  5. Step 5: Solve for x
    x = 428,712.13/651.72
  6. Step 6: Final answer
    x = 657.82

Related Problems

Find fourth proportional to 325.86, 449.61 and 238.38
Half scale
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Double scale
Find fourth proportional to 652.72, 900.60 and 477.76
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.