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Finding the Fourth Proportional to 890,681.40, 1,336,022.10 and 800,479.80

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Solution

The fourth proportional to 890,681.40, 1,336,022.10 and 800,479.80 is: 1,200,719.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,681.40 : 1,336,022.10 = 800,479.80 : x
  2. Step 2: Convert to fraction form
    890,681.40/1,336,022.10 = 800,479.80/x
  3. Step 3: Cross multiply
    890,681.40x = 1,336,022.10 × 800,479.80
  4. Step 4: Simplify right side
    890,681.40x = 1,069,458,703,403.58
  5. Step 5: Solve for x
    x = 1,069,458,703,403.58/890,681.40
  6. Step 6: Final answer
    x = 1,200,719.70

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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.