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Finding the Fourth Proportional to 651.39, 899.13 and 618.33

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Solution

The fourth proportional to 651.39, 899.13 and 618.33 is: 853.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.39 : 899.13 = 618.33 : x
  2. Step 2: Convert to fraction form
    651.39/899.13 = 618.33/x
  3. Step 3: Cross multiply
    651.39x = 899.13 × 618.33
  4. Step 4: Simplify right side
    651.39x = 555,959.05
  5. Step 5: Solve for x
    x = 555,959.05/651.39
  6. Step 6: Final answer
    x = 853.50

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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.