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Finding the Fourth Proportional to 280,710.95, 421,187.07 and 91,229.39

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Solution

The fourth proportional to 280,710.95, 421,187.07 and 91,229.39 is: 136,883.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,710.95 : 421,187.07 = 91,229.39 : x
  2. Step 2: Convert to fraction form
    280,710.95/421,187.07 = 91,229.39/x
  3. Step 3: Cross multiply
    280,710.95x = 421,187.07 × 91,229.39
  4. Step 4: Simplify right side
    280,710.95x = 38,424,640,068.81
  5. Step 5: Solve for x
    x = 38,424,640,068.81/280,710.95
  6. Step 6: Final answer
    x = 136,883.30

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1.5x scale

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.