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Finding the Fourth Proportional to 527,987.76, 728,632.56 and 286,278.48

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Solution

The fourth proportional to 527,987.76, 728,632.56 and 286,278.48 is: 395,069.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,987.76 : 728,632.56 = 286,278.48 : x
  2. Step 2: Convert to fraction form
    527,987.76/728,632.56 = 286,278.48/x
  3. Step 3: Cross multiply
    527,987.76x = 728,632.56 × 286,278.48
  4. Step 4: Simplify right side
    527,987.76x = 208,591,821,755.31
  5. Step 5: Solve for x
    x = 208,591,821,755.31/527,987.76
  6. Step 6: Final answer
    x = 395,069.43

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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.