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Finding the Fourth Proportional to 258,013.10, 387,019.65 and 156,973.70

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Solution

The fourth proportional to 258,013.10, 387,019.65 and 156,973.70 is: 235,460.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,013.10 : 387,019.65 = 156,973.70 : x
  2. Step 2: Convert to fraction form
    258,013.10/387,019.65 = 156,973.70/x
  3. Step 3: Cross multiply
    258,013.10x = 387,019.65 × 156,973.70
  4. Step 4: Simplify right side
    258,013.10x = 60,751,906,433.21
  5. Step 5: Solve for x
    x = 60,751,906,433.21/258,013.10
  6. Step 6: Final answer
    x = 235,460.55

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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.