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Finding the Fourth Proportional to 261,878.40, 361,439.28 and 154,442.16

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Solution

The fourth proportional to 261,878.40, 361,439.28 and 154,442.16 is: 213,157.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,878.40 : 361,439.28 = 154,442.16 : x
  2. Step 2: Convert to fraction form
    261,878.40/361,439.28 = 154,442.16/x
  3. Step 3: Cross multiply
    261,878.40x = 361,439.28 × 154,442.16
  4. Step 4: Simplify right side
    261,878.40x = 55,821,463,112.04
  5. Step 5: Solve for x
    x = 55,821,463,112.04/261,878.40
  6. Step 6: Final answer
    x = 213,157.95

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1.5x scale

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.