Home / 809,161.95-1,212,728.01-429,144.74

Finding the Fourth Proportional to 809,161.95, 1,212,728.01 and 429,144.74

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Solution

The fourth proportional to 809,161.95, 1,212,728.01 and 429,144.74 is: 643,178.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,161.95 : 1,212,728.01 = 429,144.74 : x
  2. Step 2: Convert to fraction form
    809,161.95/1,212,728.01 = 429,144.74/x
  3. Step 3: Cross multiply
    809,161.95x = 1,212,728.01 × 429,144.74
  4. Step 4: Simplify right side
    809,161.95x = 520,435,840,478.53
  5. Step 5: Solve for x
    x = 520,435,840,478.53/809,161.95
  6. Step 6: Final answer
    x = 643,178.84

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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.