Home / 878,638.40-1,319,512.80-679,443.20

Finding the Fourth Proportional to 878,638.40, 1,319,512.80 and 679,443.20

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Solution

The fourth proportional to 878,638.40, 1,319,512.80 and 679,443.20 is: 1,020,367.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,638.40 : 1,319,512.80 = 679,443.20 : x
  2. Step 2: Convert to fraction form
    878,638.40/1,319,512.80 = 679,443.20/x
  3. Step 3: Cross multiply
    878,638.40x = 1,319,512.80 × 679,443.20
  4. Step 4: Simplify right side
    878,638.40x = 896,533,999,272.96
  5. Step 5: Solve for x
    x = 896,533,999,272.96/878,638.40
  6. Step 6: Final answer
    x = 1,020,367.42

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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.