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Finding the Fourth Proportional to 763,637.76, 1,056,103.56 and 667,978.20

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Solution

The fourth proportional to 763,637.76, 1,056,103.56 and 667,978.20 is: 923,807.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,637.76 : 1,056,103.56 = 667,978.20 : x
  2. Step 2: Convert to fraction form
    763,637.76/1,056,103.56 = 667,978.20/x
  3. Step 3: Cross multiply
    763,637.76x = 1,056,103.56 × 667,978.20
  4. Step 4: Simplify right side
    763,637.76x = 705,454,155,022.39
  5. Step 5: Solve for x
    x = 705,454,155,022.39/763,637.76
  6. Step 6: Final answer
    x = 923,807.32

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Double scale
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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.