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Finding the Fourth Proportional to 903,909.20, 1,356,401.40 and 343,000.40

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Solution

The fourth proportional to 903,909.20, 1,356,401.40 and 343,000.40 is: 514,704.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    903,909.20 : 1,356,401.40 = 343,000.40 : x
  2. Step 2: Convert to fraction form
    903,909.20/1,356,401.40 = 343,000.40/x
  3. Step 3: Cross multiply
    903,909.20x = 1,356,401.40 × 343,000.40
  4. Step 4: Simplify right side
    903,909.20x = 465,246,222,760.56
  5. Step 5: Solve for x
    x = 465,246,222,760.56/903,909.20
  6. Step 6: Final answer
    x = 514,704.60

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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.