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Finding the Fourth Proportional to 1,148.16, 1,720.84 and 841.32

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Solution

The fourth proportional to 1,148.16, 1,720.84 and 841.32 is: 1,260.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.16 : 1,720.84 = 841.32 : x
  2. Step 2: Convert to fraction form
    1,148.16/1,720.84 = 841.32/x
  3. Step 3: Cross multiply
    1,148.16x = 1,720.84 × 841.32
  4. Step 4: Simplify right side
    1,148.16x = 1,447,777.11
  5. Step 5: Solve for x
    x = 1,447,777.11/1,148.16
  6. Step 6: Final answer
    x = 1,260.95

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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.