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Finding the Fourth Proportional to 554,575.07, 765,321.04 and 312,856.90

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Solution

The fourth proportional to 554,575.07, 765,321.04 and 312,856.90 is: 431,746.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,575.07 : 765,321.04 = 312,856.90 : x
  2. Step 2: Convert to fraction form
    554,575.07/765,321.04 = 312,856.90/x
  3. Step 3: Cross multiply
    554,575.07x = 765,321.04 × 312,856.90
  4. Step 4: Simplify right side
    554,575.07x = 239,435,966,556.95
  5. Step 5: Solve for x
    x = 239,435,966,556.95/554,575.07
  6. Step 6: Final answer
    x = 431,746.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.