Home / 665,680.12-918,532.38-379,205.80

Finding the Fourth Proportional to 665,680.12, 918,532.38 and 379,205.80

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Solution

The fourth proportional to 665,680.12, 918,532.38 and 379,205.80 is: 523,243.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,680.12 : 918,532.38 = 379,205.80 : x
  2. Step 2: Convert to fraction form
    665,680.12/918,532.38 = 379,205.80/x
  3. Step 3: Cross multiply
    665,680.12x = 918,532.38 × 379,205.80
  4. Step 4: Simplify right side
    665,680.12x = 348,312,805,983.80
  5. Step 5: Solve for x
    x = 348,312,805,983.80/665,680.12
  6. Step 6: Final answer
    x = 523,243.52

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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.