Home / 485,144.04-669,440.66-278,401.80

Finding the Fourth Proportional to 485,144.04, 669,440.66 and 278,401.80

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Solution

The fourth proportional to 485,144.04, 669,440.66 and 278,401.80 is: 384,161.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,144.04 : 669,440.66 = 278,401.80 : x
  2. Step 2: Convert to fraction form
    485,144.04/669,440.66 = 278,401.80/x
  3. Step 3: Cross multiply
    485,144.04x = 669,440.66 × 278,401.80
  4. Step 4: Simplify right side
    485,144.04x = 186,373,484,737.19
  5. Step 5: Solve for x
    x = 186,373,484,737.19/485,144.04
  6. Step 6: Final answer
    x = 384,161.13

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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.