Home / 400,815.15-553,133.25-219,534.72

Finding the Fourth Proportional to 400,815.15, 553,133.25 and 219,534.72

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Solution

The fourth proportional to 400,815.15, 553,133.25 and 219,534.72 is: 302,962.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,815.15 : 553,133.25 = 219,534.72 : x
  2. Step 2: Convert to fraction form
    400,815.15/553,133.25 = 219,534.72/x
  3. Step 3: Cross multiply
    400,815.15x = 553,133.25 × 219,534.72
  4. Step 4: Simplify right side
    400,815.15x = 121,431,953,161.44
  5. Step 5: Solve for x
    x = 121,431,953,161.44/400,815.15
  6. Step 6: Final answer
    x = 302,962.48

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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.