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Finding the Fourth Proportional to 326,258.55, 489,386.91 and 89,601.45

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Solution

The fourth proportional to 326,258.55, 489,386.91 and 89,601.45 is: 134,401.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,258.55 : 489,386.91 = 89,601.45 : x
  2. Step 2: Convert to fraction form
    326,258.55/489,386.91 = 89,601.45/x
  3. Step 3: Cross multiply
    326,258.55x = 489,386.91 × 89,601.45
  4. Step 4: Simplify right side
    326,258.55x = 43,849,776,747.02
  5. Step 5: Solve for x
    x = 43,849,776,747.02/326,258.55
  6. Step 6: Final answer
    x = 134,401.92

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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.