Home / 402,215.28-555,041.88-223,378.80

Finding the Fourth Proportional to 402,215.28, 555,041.88 and 223,378.80

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Solution

The fourth proportional to 402,215.28, 555,041.88 and 223,378.80 is: 308,254.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,215.28 : 555,041.88 = 223,378.80 : x
  2. Step 2: Convert to fraction form
    402,215.28/555,041.88 = 223,378.80/x
  3. Step 3: Cross multiply
    402,215.28x = 555,041.88 × 223,378.80
  4. Step 4: Simplify right side
    402,215.28x = 123,984,589,104.14
  5. Step 5: Solve for x
    x = 123,984,589,104.14/402,215.28
  6. Step 6: Final answer
    x = 308,254.30

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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.