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Finding the Fourth Proportional to 915,712.80, 1,370,458.80 and 803,738.40

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Solution

The fourth proportional to 915,712.80, 1,370,458.80 and 803,738.40 is: 1,202,877.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,712.80 : 1,370,458.80 = 803,738.40 : x
  2. Step 2: Convert to fraction form
    915,712.80/1,370,458.80 = 803,738.40/x
  3. Step 3: Cross multiply
    915,712.80x = 1,370,458.80 × 803,738.40
  4. Step 4: Simplify right side
    915,712.80x = 1,101,490,363,177.92
  5. Step 5: Solve for x
    x = 1,101,490,363,177.92/915,712.80
  6. Step 6: Final answer
    x = 1,202,877.54

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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.