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Finding the Fourth Proportional to 287,675.74, 397,162.80 and 255,756.47

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Solution

The fourth proportional to 287,675.74, 397,162.80 and 255,756.47 is: 353,095.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,675.74 : 397,162.80 = 255,756.47 : x
  2. Step 2: Convert to fraction form
    287,675.74/397,162.80 = 255,756.47/x
  3. Step 3: Cross multiply
    287,675.74x = 397,162.80 × 255,756.47
  4. Step 4: Simplify right side
    287,675.74x = 101,576,954,464.53
  5. Step 5: Solve for x
    x = 101,576,954,464.53/287,675.74
  6. Step 6: Final answer
    x = 353,095.32

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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.