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Finding the Fourth Proportional to 258,010.10, 387,015.15 and 156,970.70

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Solution

The fourth proportional to 258,010.10, 387,015.15 and 156,970.70 is: 235,456.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,010.10 : 387,015.15 = 156,970.70 : x
  2. Step 2: Convert to fraction form
    258,010.10/387,015.15 = 156,970.70/x
  3. Step 3: Cross multiply
    258,010.10x = 387,015.15 × 156,970.70
  4. Step 4: Simplify right side
    258,010.10x = 60,750,039,006.11
  5. Step 5: Solve for x
    x = 60,750,039,006.11/258,010.10
  6. Step 6: Final answer
    x = 235,456.05

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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.