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Finding the Fourth Proportional to 305,535, 421,641.18 and 171,401.88

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Solution

The fourth proportional to 305,535, 421,641.18 and 171,401.88 is: 236,536.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,535 : 421,641.18 = 171,401.88 : x
  2. Step 2: Convert to fraction form
    305,535/421,641.18 = 171,401.88/x
  3. Step 3: Cross multiply
    305,535x = 421,641.18 × 171,401.88
  4. Step 4: Simplify right side
    305,535x = 72,270,090,937.42
  5. Step 5: Solve for x
    x = 72,270,090,937.42/305,535
  6. Step 6: Final answer
    x = 236,536.21

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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.