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Finding the Fourth Proportional to 280,779.44, 387,481.80 and 153,463.28

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Solution

The fourth proportional to 280,779.44, 387,481.80 and 153,463.28 is: 211,782.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,779.44 : 387,481.80 = 153,463.28 : x
  2. Step 2: Convert to fraction form
    280,779.44/387,481.80 = 153,463.28/x
  3. Step 3: Cross multiply
    280,779.44x = 387,481.80 × 153,463.28
  4. Step 4: Simplify right side
    280,779.44x = 59,464,227,968.30
  5. Step 5: Solve for x
    x = 59,464,227,968.30/280,779.44
  6. Step 6: Final answer
    x = 211,782.70

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1.5x scale

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.