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Finding the Fourth Proportional to 651.69, 899.11 and 402.75

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Solution

The fourth proportional to 651.69, 899.11 and 402.75 is: 555.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.69 : 899.11 = 402.75 : x
  2. Step 2: Convert to fraction form
    651.69/899.11 = 402.75/x
  3. Step 3: Cross multiply
    651.69x = 899.11 × 402.75
  4. Step 4: Simplify right side
    651.69x = 362,116.55
  5. Step 5: Solve for x
    x = 362,116.55/651.69
  6. Step 6: Final answer
    x = 555.66

Related Problems

Find fourth proportional to 325.85, 449.56 and 201.38
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Double scale
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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.