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Finding the Fourth Proportional to 912,809.90, 1,369,344.45 and 281,657.90

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Solution

The fourth proportional to 912,809.90, 1,369,344.45 and 281,657.90 is: 422,526.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,809.90 : 1,369,344.45 = 281,657.90 : x
  2. Step 2: Convert to fraction form
    912,809.90/1,369,344.45 = 281,657.90/x
  3. Step 3: Cross multiply
    912,809.90x = 1,369,344.45 × 281,657.90
  4. Step 4: Simplify right side
    912,809.90x = 385,686,682,163.66
  5. Step 5: Solve for x
    x = 385,686,682,163.66/912,809.90
  6. Step 6: Final answer
    x = 422,526.84

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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.