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Finding the Fourth Proportional to 651.59, 899.09 and 618.76

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Solution

The fourth proportional to 651.59, 899.09 and 618.76 is: 853.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.59 : 899.09 = 618.76 : x
  2. Step 2: Convert to fraction form
    651.59/899.09 = 618.76/x
  3. Step 3: Cross multiply
    651.59x = 899.09 × 618.76
  4. Step 4: Simplify right side
    651.59x = 556,320.93
  5. Step 5: Solve for x
    x = 556,320.93/651.59
  6. Step 6: Final answer
    x = 853.79

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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.