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Finding the Fourth Proportional to 315,966.28, 473,950.32 and 91,345

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Solution

The fourth proportional to 315,966.28, 473,950.32 and 91,345 is: 137,017.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,966.28 : 473,950.32 = 91,345 : x
  2. Step 2: Convert to fraction form
    315,966.28/473,950.32 = 91,345/x
  3. Step 3: Cross multiply
    315,966.28x = 473,950.32 × 91,345
  4. Step 4: Simplify right side
    315,966.28x = 43,292,991,980.40
  5. Step 5: Solve for x
    x = 43,292,991,980.40/315,966.28
  6. Step 6: Final answer
    x = 137,017.76

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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.