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Finding the Fourth Proportional to 315,480.81, 473,225.31 and 90,844.92

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Solution

The fourth proportional to 315,480.81, 473,225.31 and 90,844.92 is: 136,268.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,480.81 : 473,225.31 = 90,844.92 : x
  2. Step 2: Convert to fraction form
    315,480.81/473,225.31 = 90,844.92/x
  3. Step 3: Cross multiply
    315,480.81x = 473,225.31 × 90,844.92
  4. Step 4: Simplify right side
    315,480.81x = 42,990,115,428.93
  5. Step 5: Solve for x
    x = 42,990,115,428.93/315,480.81
  6. Step 6: Final answer
    x = 136,268.56

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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.