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Finding the Fourth Proportional to 816,000.20, 1,224,000.30 and 343,219.40

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Solution

The fourth proportional to 816,000.20, 1,224,000.30 and 343,219.40 is: 514,829.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,000.20 : 1,224,000.30 = 343,219.40 : x
  2. Step 2: Convert to fraction form
    816,000.20/1,224,000.30 = 343,219.40/x
  3. Step 3: Cross multiply
    816,000.20x = 1,224,000.30 × 343,219.40
  4. Step 4: Simplify right side
    816,000.20x = 420,100,648,565.82
  5. Step 5: Solve for x
    x = 420,100,648,565.82/816,000.20
  6. Step 6: Final answer
    x = 514,829.10

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Double scale
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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.