Home / 258,011.60-387,017.40-156,972.20

Finding the Fourth Proportional to 258,011.60, 387,017.40 and 156,972.20

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Solution

The fourth proportional to 258,011.60, 387,017.40 and 156,972.20 is: 235,458.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,011.60 : 387,017.40 = 156,972.20 : x
  2. Step 2: Convert to fraction form
    258,011.60/387,017.40 = 156,972.20/x
  3. Step 3: Cross multiply
    258,011.60x = 387,017.40 × 156,972.20
  4. Step 4: Simplify right side
    258,011.60x = 60,750,972,716.28
  5. Step 5: Solve for x
    x = 60,750,972,716.28/258,011.60
  6. Step 6: Final answer
    x = 235,458.30

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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.