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Finding the Fourth Proportional to 448,779.90, 619,135.47 and 287,605.32

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Solution

The fourth proportional to 448,779.90, 619,135.47 and 287,605.32 is: 396,779.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,779.90 : 619,135.47 = 287,605.32 : x
  2. Step 2: Convert to fraction form
    448,779.90/619,135.47 = 287,605.32/x
  3. Step 3: Cross multiply
    448,779.90x = 619,135.47 × 287,605.32
  4. Step 4: Simplify right side
    448,779.90x = 178,066,654,972.70
  5. Step 5: Solve for x
    x = 178,066,654,972.70/448,779.90
  6. Step 6: Final answer
    x = 396,779.48

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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.