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Finding the Fourth Proportional to 372,005.49, 513,407.66 and 210,843.21

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Solution

The fourth proportional to 372,005.49, 513,407.66 and 210,843.21 is: 290,986.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,005.49 : 513,407.66 = 210,843.21 : x
  2. Step 2: Convert to fraction form
    372,005.49/513,407.66 = 210,843.21/x
  3. Step 3: Cross multiply
    372,005.49x = 513,407.66 × 210,843.21
  4. Step 4: Simplify right side
    372,005.49x = 108,248,518,018.77
  5. Step 5: Solve for x
    x = 108,248,518,018.77/372,005.49
  6. Step 6: Final answer
    x = 290,986.35

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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.