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Finding the Fourth Proportional to 287,814.92, 397,062.07 and 211,200.91

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Solution

The fourth proportional to 287,814.92, 397,062.07 and 211,200.91 is: 291,367.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,814.92 : 397,062.07 = 211,200.91 : x
  2. Step 2: Convert to fraction form
    287,814.92/397,062.07 = 211,200.91/x
  3. Step 3: Cross multiply
    287,814.92x = 397,062.07 × 211,200.91
  4. Step 4: Simplify right side
    287,814.92x = 83,859,868,989.83
  5. Step 5: Solve for x
    x = 83,859,868,989.83/287,814.92
  6. Step 6: Final answer
    x = 291,367.35

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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.