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Finding the Fourth Proportional to 210,908.80, 291,058.32 and 115,415.20

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Solution

The fourth proportional to 210,908.80, 291,058.32 and 115,415.20 is: 159,275.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,908.80 : 291,058.32 = 115,415.20 : x
  2. Step 2: Convert to fraction form
    210,908.80/291,058.32 = 115,415.20/x
  3. Step 3: Cross multiply
    210,908.80x = 291,058.32 × 115,415.20
  4. Step 4: Simplify right side
    210,908.80x = 33,592,554,214.46
  5. Step 5: Solve for x
    x = 33,592,554,214.46/210,908.80
  6. Step 6: Final answer
    x = 159,275.26

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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.