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Finding the Fourth Proportional to 353,358.72, 487,669.44 and 263,779.20

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Solution

The fourth proportional to 353,358.72, 487,669.44 and 263,779.20 is: 364,040.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,358.72 : 487,669.44 = 263,779.20 : x
  2. Step 2: Convert to fraction form
    353,358.72/487,669.44 = 263,779.20/x
  3. Step 3: Cross multiply
    353,358.72x = 487,669.44 × 263,779.20
  4. Step 4: Simplify right side
    353,358.72x = 128,637,054,747.65
  5. Step 5: Solve for x
    x = 128,637,054,747.65/353,358.72
  6. Step 6: Final answer
    x = 364,040.98

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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.