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Finding the Fourth Proportional to 485,041.84, 669,364.66 and 278,343.90

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Solution

The fourth proportional to 485,041.84, 669,364.66 and 278,343.90 is: 384,118.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,041.84 : 669,364.66 = 278,343.90 : x
  2. Step 2: Convert to fraction form
    485,041.84/669,364.66 = 278,343.90/x
  3. Step 3: Cross multiply
    485,041.84x = 669,364.66 × 278,343.90
  4. Step 4: Simplify right side
    485,041.84x = 186,313,569,986.57
  5. Step 5: Solve for x
    x = 186,313,569,986.57/485,041.84
  6. Step 6: Final answer
    x = 384,118.55

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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.