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Finding the Fourth Proportional to 313,630.90, 432,812.72 and 170,390.91

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Solution

The fourth proportional to 313,630.90, 432,812.72 and 170,390.91 is: 235,140.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,630.90 : 432,812.72 = 170,390.91 : x
  2. Step 2: Convert to fraction form
    313,630.90/432,812.72 = 170,390.91/x
  3. Step 3: Cross multiply
    313,630.90x = 432,812.72 × 170,390.91
  4. Step 4: Simplify right side
    313,630.90x = 73,747,353,220.38
  5. Step 5: Solve for x
    x = 73,747,353,220.38/313,630.90
  6. Step 6: Final answer
    x = 235,140.58

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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.