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Finding the Fourth Proportional to 860.01, 1,290.02 and 243.72

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Solution

The fourth proportional to 860.01, 1,290.02 and 243.72 is: 365.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.01 : 1,290.02 = 243.72 : x
  2. Step 2: Convert to fraction form
    860.01/1,290.02 = 243.72/x
  3. Step 3: Cross multiply
    860.01x = 1,290.02 × 243.72
  4. Step 4: Simplify right side
    860.01x = 314,403.67
  5. Step 5: Solve for x
    x = 314,403.67/860.01
  6. Step 6: Final answer
    x = 365.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.