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Finding the Fourth Proportional to 822,912.60, 1,234,368.90 and 290,429.40

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Solution

The fourth proportional to 822,912.60, 1,234,368.90 and 290,429.40 is: 435,644.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    822,912.60 : 1,234,368.90 = 290,429.40 : x
  2. Step 2: Convert to fraction form
    822,912.60/1,234,368.90 = 290,429.40/x
  3. Step 3: Cross multiply
    822,912.60x = 1,234,368.90 × 290,429.40
  4. Step 4: Simplify right side
    822,912.60x = 358,497,019,005.66
  5. Step 5: Solve for x
    x = 358,497,019,005.66/822,912.60
  6. Step 6: Final answer
    x = 435,644.10

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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.