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Finding the Fourth Proportional to 1,147.51, 1,720.95 and 356.95

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Solution

The fourth proportional to 1,147.51, 1,720.95 and 356.95 is: 535.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.51 : 1,720.95 = 356.95 : x
  2. Step 2: Convert to fraction form
    1,147.51/1,720.95 = 356.95/x
  3. Step 3: Cross multiply
    1,147.51x = 1,720.95 × 356.95
  4. Step 4: Simplify right side
    1,147.51x = 614,282.71
  5. Step 5: Solve for x
    x = 614,282.71/1,147.51
  6. Step 6: Final answer
    x = 535.32

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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.