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Finding the Fourth Proportional to 893,502.80, 1,340,254.20 and 388,305.80

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Solution

The fourth proportional to 893,502.80, 1,340,254.20 and 388,305.80 is: 582,458.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    893,502.80 : 1,340,254.20 = 388,305.80 : x
  2. Step 2: Convert to fraction form
    893,502.80/1,340,254.20 = 388,305.80/x
  3. Step 3: Cross multiply
    893,502.80x = 1,340,254.20 × 388,305.80
  4. Step 4: Simplify right side
    893,502.80x = 520,428,479,334.36
  5. Step 5: Solve for x
    x = 520,428,479,334.36/893,502.80
  6. Step 6: Final answer
    x = 582,458.70

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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.