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Finding the Fourth Proportional to 321,148.16, 479,768.90 and 207,905.84

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Solution

The fourth proportional to 321,148.16, 479,768.90 and 207,905.84 is: 310,594.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,148.16 : 479,768.90 = 207,905.84 : x
  2. Step 2: Convert to fraction form
    321,148.16/479,768.90 = 207,905.84/x
  3. Step 3: Cross multiply
    321,148.16x = 479,768.90 × 207,905.84
  4. Step 4: Simplify right side
    321,148.16x = 99,746,756,160.38
  5. Step 5: Solve for x
    x = 99,746,756,160.38/321,148.16
  6. Step 6: Final answer
    x = 310,594.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.