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Finding the Fourth Proportional to 326,015.80, 489,023.70 and 306,332.80

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Solution

The fourth proportional to 326,015.80, 489,023.70 and 306,332.80 is: 459,499.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,015.80 : 489,023.70 = 306,332.80 : x
  2. Step 2: Convert to fraction form
    326,015.80/489,023.70 = 306,332.80/x
  3. Step 3: Cross multiply
    326,015.80x = 489,023.70 × 306,332.80
  4. Step 4: Simplify right side
    326,015.80x = 149,803,999,287.36
  5. Step 5: Solve for x
    x = 149,803,999,287.36/326,015.80
  6. Step 6: Final answer
    x = 459,499.20

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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.