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Finding the Fourth Proportional to 489,422.55, 675,407.72 and 274,567.22

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Solution

The fourth proportional to 489,422.55, 675,407.72 and 274,567.22 is: 378,905.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,422.55 : 675,407.72 = 274,567.22 : x
  2. Step 2: Convert to fraction form
    489,422.55/675,407.72 = 274,567.22/x
  3. Step 3: Cross multiply
    489,422.55x = 675,407.72 × 274,567.22
  4. Step 4: Simplify right side
    489,422.55x = 185,444,823,688.27
  5. Step 5: Solve for x
    x = 185,444,823,688.27/489,422.55
  6. Step 6: Final answer
    x = 378,905.35

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1.5x scale

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.