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Finding the Fourth Proportional to 421,947.90, 632,853.63 and 155,833.74

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Solution

The fourth proportional to 421,947.90, 632,853.63 and 155,833.74 is: 233,725.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,947.90 : 632,853.63 = 155,833.74 : x
  2. Step 2: Convert to fraction form
    421,947.90/632,853.63 = 155,833.74/x
  3. Step 3: Cross multiply
    421,947.90x = 632,853.63 × 155,833.74
  4. Step 4: Simplify right side
    421,947.90x = 98,619,948,035.48
  5. Step 5: Solve for x
    x = 98,619,948,035.48/421,947.90
  6. Step 6: Final answer
    x = 233,725.41

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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.