Home / 915,612.80-1,374,974.40-679,222.40

Finding the Fourth Proportional to 915,612.80, 1,374,974.40 and 679,222.40

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Solution

The fourth proportional to 915,612.80, 1,374,974.40 and 679,222.40 is: 1,019,987.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,612.80 : 1,374,974.40 = 679,222.40 : x
  2. Step 2: Convert to fraction form
    915,612.80/1,374,974.40 = 679,222.40/x
  3. Step 3: Cross multiply
    915,612.80x = 1,374,974.40 × 679,222.40
  4. Step 4: Simplify right side
    915,612.80x = 933,913,411,906.56
  5. Step 5: Solve for x
    x = 933,913,411,906.56/915,612.80
  6. Step 6: Final answer
    x = 1,019,987.28

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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.