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Finding the Fourth Proportional to 822,908.10, 1,234,362.15 and 290,424.90

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Solution

The fourth proportional to 822,908.10, 1,234,362.15 and 290,424.90 is: 435,637.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    822,908.10 : 1,234,362.15 = 290,424.90 : x
  2. Step 2: Convert to fraction form
    822,908.10/1,234,362.15 = 290,424.90/x
  3. Step 3: Cross multiply
    822,908.10x = 1,234,362.15 × 290,424.90
  4. Step 4: Simplify right side
    822,908.10x = 358,489,503,977.54
  5. Step 5: Solve for x
    x = 358,489,503,977.54/822,908.10
  6. Step 6: Final answer
    x = 435,637.35

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Double scale
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Similar ratio
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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.