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Finding the Fourth Proportional to 326,187.90, 489,281.85 and 186,219.90

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Solution

The fourth proportional to 326,187.90, 489,281.85 and 186,219.90 is: 279,329.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,187.90 : 489,281.85 = 186,219.90 : x
  2. Step 2: Convert to fraction form
    326,187.90/489,281.85 = 186,219.90/x
  3. Step 3: Cross multiply
    326,187.90x = 489,281.85 × 186,219.90
  4. Step 4: Simplify right side
    326,187.90x = 91,114,017,178.82
  5. Step 5: Solve for x
    x = 91,114,017,178.82/326,187.90
  6. Step 6: Final answer
    x = 279,329.85

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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.