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Finding the Fourth Proportional to 343,667.70, 515,501.55 and 90,947.70

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Solution

The fourth proportional to 343,667.70, 515,501.55 and 90,947.70 is: 136,421.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,667.70 : 515,501.55 = 90,947.70 : x
  2. Step 2: Convert to fraction form
    343,667.70/515,501.55 = 90,947.70/x
  3. Step 3: Cross multiply
    343,667.70x = 515,501.55 × 90,947.70
  4. Step 4: Simplify right side
    343,667.70x = 46,883,680,318.94
  5. Step 5: Solve for x
    x = 46,883,680,318.94/343,667.70
  6. Step 6: Final answer
    x = 136,421.55

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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.