Home / 280,711.31-387,391.18-153,395.11

Finding the Fourth Proportional to 280,711.31, 387,391.18 and 153,395.11

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Solution

The fourth proportional to 280,711.31, 387,391.18 and 153,395.11 is: 211,690.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,711.31 : 387,391.18 = 153,395.11 : x
  2. Step 2: Convert to fraction form
    280,711.31/387,391.18 = 153,395.11/x
  3. Step 3: Cross multiply
    280,711.31x = 387,391.18 × 153,395.11
  4. Step 4: Simplify right side
    280,711.31x = 59,423,911,317.16
  5. Step 5: Solve for x
    x = 59,423,911,317.16/280,711.31
  6. Step 6: Final answer
    x = 211,690.48

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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.