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Finding the Fourth Proportional to 372,145.66, 513,549 and 211,015.06

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Solution

The fourth proportional to 372,145.66, 513,549 and 211,015.06 is: 291,193.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,145.66 : 513,549 = 211,015.06 : x
  2. Step 2: Convert to fraction form
    372,145.66/513,549 = 211,015.06/x
  3. Step 3: Cross multiply
    372,145.66x = 513,549 × 211,015.06
  4. Step 4: Simplify right side
    372,145.66x = 108,366,573,047.94
  5. Step 5: Solve for x
    x = 108,366,573,047.94/372,145.66
  6. Step 6: Final answer
    x = 291,193.97

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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.