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Finding the Fourth Proportional to 528,449.25, 729,257.52 and 286,731.23

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Solution

The fourth proportional to 528,449.25, 729,257.52 and 286,731.23 is: 395,687.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,449.25 : 729,257.52 = 286,731.23 : x
  2. Step 2: Convert to fraction form
    528,449.25/729,257.52 = 286,731.23/x
  3. Step 3: Cross multiply
    528,449.25x = 729,257.52 × 286,731.23
  4. Step 4: Simplify right side
    528,449.25x = 209,100,902,050.06
  5. Step 5: Solve for x
    x = 209,100,902,050.06/528,449.25
  6. Step 6: Final answer
    x = 395,687.76

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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.