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Finding the Fourth Proportional to 258,430.64, 356,616.72 and 156,512.70

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Solution

The fourth proportional to 258,430.64, 356,616.72 and 156,512.70 is: 215,976.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,430.64 : 356,616.72 = 156,512.70 : x
  2. Step 2: Convert to fraction form
    258,430.64/356,616.72 = 156,512.70/x
  3. Step 3: Cross multiply
    258,430.64x = 356,616.72 × 156,512.70
  4. Step 4: Simplify right side
    258,430.64x = 55,815,045,712.34
  5. Step 5: Solve for x
    x = 55,815,045,712.34/258,430.64
  6. Step 6: Final answer
    x = 215,976.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.