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Finding the Fourth Proportional to 938,649.28, 1,405,641.08 and 859,013.28

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Solution

The fourth proportional to 938,649.28, 1,405,641.08 and 859,013.28 is: 1,286,385.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    938,649.28 : 1,405,641.08 = 859,013.28 : x
  2. Step 2: Convert to fraction form
    938,649.28/1,405,641.08 = 859,013.28/x
  3. Step 3: Cross multiply
    938,649.28x = 1,405,641.08 × 859,013.28
  4. Step 4: Simplify right side
    938,649.28x = 1,207,464,354,633.54
  5. Step 5: Solve for x
    x = 1,207,464,354,633.54/938,649.28
  6. Step 6: Final answer
    x = 1,286,385.00

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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.