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Finding the Fourth Proportional to 315,089.20, 472,633.80 and 104,759.60

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Solution

The fourth proportional to 315,089.20, 472,633.80 and 104,759.60 is: 157,139.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,089.20 : 472,633.80 = 104,759.60 : x
  2. Step 2: Convert to fraction form
    315,089.20/472,633.80 = 104,759.60/x
  3. Step 3: Cross multiply
    315,089.20x = 472,633.80 × 104,759.60
  4. Step 4: Simplify right side
    315,089.20x = 49,512,927,834.48
  5. Step 5: Solve for x
    x = 49,512,927,834.48/315,089.20
  6. Step 6: Final answer
    x = 157,139.40

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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.