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Finding the Fourth Proportional to 313,639.70, 432,820.50 and 170,400.92

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Solution

The fourth proportional to 313,639.70, 432,820.50 and 170,400.92 is: 235,152.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,639.70 : 432,820.50 = 170,400.92 : x
  2. Step 2: Convert to fraction form
    313,639.70/432,820.50 = 170,400.92/x
  3. Step 3: Cross multiply
    313,639.70x = 432,820.50 × 170,400.92
  4. Step 4: Simplify right side
    313,639.70x = 73,753,011,394.86
  5. Step 5: Solve for x
    x = 73,753,011,394.86/313,639.70
  6. Step 6: Final answer
    x = 235,152.03

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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.