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Finding the Fourth Proportional to 402,728.44, 555,779.52 and 221,454.16

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Solution

The fourth proportional to 402,728.44, 555,779.52 and 221,454.16 is: 305,614.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,728.44 : 555,779.52 = 221,454.16 : x
  2. Step 2: Convert to fraction form
    402,728.44/555,779.52 = 221,454.16/x
  3. Step 3: Cross multiply
    402,728.44x = 555,779.52 × 221,454.16
  4. Step 4: Simplify right side
    402,728.44x = 123,079,686,746.80
  5. Step 5: Solve for x
    x = 123,079,686,746.80/402,728.44
  6. Step 6: Final answer
    x = 305,614.59

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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.