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Finding the Fourth Proportional to 477,671.39, 715,545.40 and 221,142.36

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Solution

The fourth proportional to 477,671.39, 715,545.40 and 221,142.36 is: 331,268.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    477,671.39 : 715,545.40 = 221,142.36 : x
  2. Step 2: Convert to fraction form
    477,671.39/715,545.40 = 221,142.36/x
  3. Step 3: Cross multiply
    477,671.39x = 715,545.40 × 221,142.36
  4. Step 4: Simplify right side
    477,671.39x = 158,237,398,443.14
  5. Step 5: Solve for x
    x = 158,237,398,443.14/477,671.39
  6. Step 6: Final answer
    x = 331,268.32

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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.