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Finding the Fourth Proportional to 287,688.40, 397,180.10 and 255,768.98

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Solution

The fourth proportional to 287,688.40, 397,180.10 and 255,768.98 is: 353,112.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,688.40 : 397,180.10 = 255,768.98 : x
  2. Step 2: Convert to fraction form
    287,688.40/397,180.10 = 255,768.98/x
  3. Step 3: Cross multiply
    287,688.40x = 397,180.10 × 255,768.98
  4. Step 4: Simplify right side
    287,688.40x = 101,586,349,053.30
  5. Step 5: Solve for x
    x = 101,586,349,053.30/287,688.40
  6. Step 6: Final answer
    x = 353,112.43

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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.