Home / 491,440.69-678,397.38-330,389.13

Finding the Fourth Proportional to 491,440.69, 678,397.38 and 330,389.13

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Solution

The fourth proportional to 491,440.69, 678,397.38 and 330,389.13 is: 456,077.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,440.69 : 678,397.38 = 330,389.13 : x
  2. Step 2: Convert to fraction form
    491,440.69/678,397.38 = 330,389.13/x
  3. Step 3: Cross multiply
    491,440.69x = 678,397.38 × 330,389.13
  4. Step 4: Simplify right side
    491,440.69x = 224,135,120,172.48
  5. Step 5: Solve for x
    x = 224,135,120,172.48/491,440.69
  6. Step 6: Final answer
    x = 456,077.66

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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.