Home / 828,498.78-1,241,730.54-428,911.74

Finding the Fourth Proportional to 828,498.78, 1,241,730.54 and 428,911.74

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Solution

The fourth proportional to 828,498.78, 1,241,730.54 and 428,911.74 is: 642,840.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,498.78 : 1,241,730.54 = 428,911.74 : x
  2. Step 2: Convert to fraction form
    828,498.78/1,241,730.54 = 428,911.74/x
  3. Step 3: Cross multiply
    828,498.78x = 1,241,730.54 × 428,911.74
  4. Step 4: Simplify right side
    828,498.78x = 532,592,806,522.54
  5. Step 5: Solve for x
    x = 532,592,806,522.54/828,498.78
  6. Step 6: Final answer
    x = 642,840.79

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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.