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Finding the Fourth Proportional to 279,473.49, 385,682.85 and 156,987.54

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Solution

The fourth proportional to 279,473.49, 385,682.85 and 156,987.54 is: 216,648.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,473.49 : 385,682.85 = 156,987.54 : x
  2. Step 2: Convert to fraction form
    279,473.49/385,682.85 = 156,987.54/x
  3. Step 3: Cross multiply
    279,473.49x = 385,682.85 × 156,987.54
  4. Step 4: Simplify right side
    279,473.49x = 60,547,401,841.69
  5. Step 5: Solve for x
    x = 60,547,401,841.69/279,473.49
  6. Step 6: Final answer
    x = 216,648.10

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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.