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Finding the Fourth Proportional to 822,801.70, 1,135,009.38 and 478,598.88

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Solution

The fourth proportional to 822,801.70, 1,135,009.38 and 478,598.88 is: 660,200.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    822,801.70 : 1,135,009.38 = 478,598.88 : x
  2. Step 2: Convert to fraction form
    822,801.70/1,135,009.38 = 478,598.88/x
  3. Step 3: Cross multiply
    822,801.70x = 1,135,009.38 × 478,598.88
  4. Step 4: Simplify right side
    822,801.70x = 543,214,218,057.49
  5. Step 5: Solve for x
    x = 543,214,218,057.49/822,801.70
  6. Step 6: Final answer
    x = 660,200.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.