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Finding the Fourth Proportional to 845,829.52, 1,268,978.46 and 390,559.70

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Solution

The fourth proportional to 845,829.52, 1,268,978.46 and 390,559.70 is: 585,947.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    845,829.52 : 1,268,978.46 = 390,559.70 : x
  2. Step 2: Convert to fraction form
    845,829.52/1,268,978.46 = 390,559.70/x
  3. Step 3: Cross multiply
    845,829.52x = 1,268,978.46 × 390,559.70
  4. Step 4: Simplify right side
    845,829.52x = 495,611,846,644.06
  5. Step 5: Solve for x
    x = 495,611,846,644.06/845,829.52
  6. Step 6: Final answer
    x = 585,947.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.