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Finding the Fourth Proportional to 326,437.80, 489,656.70 and 186,210.60

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Solution

The fourth proportional to 326,437.80, 489,656.70 and 186,210.60 is: 279,315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,437.80 : 489,656.70 = 186,210.60 : x
  2. Step 2: Convert to fraction form
    326,437.80/489,656.70 = 186,210.60/x
  3. Step 3: Cross multiply
    326,437.80x = 489,656.70 × 186,210.60
  4. Step 4: Simplify right side
    326,437.80x = 91,179,267,901.02
  5. Step 5: Solve for x
    x = 91,179,267,901.02/326,437.80
  6. Step 6: Final answer
    x = 279,315.90

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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.