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Finding the Fourth Proportional to 326,407.59, 489,258.24 and 136,970.87

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Solution

The fourth proportional to 326,407.59, 489,258.24 and 136,970.87 is: 205,308.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,407.59 : 489,258.24 = 136,970.87 : x
  2. Step 2: Convert to fraction form
    326,407.59/489,258.24 = 136,970.87/x
  3. Step 3: Cross multiply
    326,407.59x = 489,258.24 × 136,970.87
  4. Step 4: Simplify right side
    326,407.59x = 67,014,124,341.18
  5. Step 5: Solve for x
    x = 67,014,124,341.18/326,407.59
  6. Step 6: Final answer
    x = 205,308.11

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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.