Home / 1,539.17-2,122.86-1,007.45

Finding the Fourth Proportional to 1,539.17, 2,122.86 and 1,007.45

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Solution

The fourth proportional to 1,539.17, 2,122.86 and 1,007.45 is: 1,389.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.17 : 2,122.86 = 1,007.45 : x
  2. Step 2: Convert to fraction form
    1,539.17/2,122.86 = 1,007.45/x
  3. Step 3: Cross multiply
    1,539.17x = 2,122.86 × 1,007.45
  4. Step 4: Simplify right side
    1,539.17x = 2,138,682.71
  5. Step 5: Solve for x
    x = 2,138,682.71/1,539.17
  6. Step 6: Final answer
    x = 1,389.51

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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.