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Finding the Fourth Proportional to 853,662.80, 1,278,809.40 and 433,240.40

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Solution

The fourth proportional to 853,662.80, 1,278,809.40 and 433,240.40 is: 649,005.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,662.80 : 1,278,809.40 = 433,240.40 : x
  2. Step 2: Convert to fraction form
    853,662.80/1,278,809.40 = 433,240.40/x
  3. Step 3: Cross multiply
    853,662.80x = 1,278,809.40 × 433,240.40
  4. Step 4: Simplify right side
    853,662.80x = 554,031,895,979.76
  5. Step 5: Solve for x
    x = 554,031,895,979.76/853,662.80
  6. Step 6: Final answer
    x = 649,005.55

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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.