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Finding the Fourth Proportional to 326,407.68, 489,254.40 and 139,530.24

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Solution

The fourth proportional to 326,407.68, 489,254.40 and 139,530.24 is: 209,142.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,407.68 : 489,254.40 = 139,530.24 : x
  2. Step 2: Convert to fraction form
    326,407.68/489,254.40 = 139,530.24/x
  3. Step 3: Cross multiply
    326,407.68x = 489,254.40 × 139,530.24
  4. Step 4: Simplify right side
    326,407.68x = 68,265,783,853.06
  5. Step 5: Solve for x
    x = 68,265,783,853.06/326,407.68
  6. Step 6: Final answer
    x = 209,142.70

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1.5x scale

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.