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Finding the Fourth Proportional to 210,255.30, 314,864.55 and 139,752.90

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Solution

The fourth proportional to 210,255.30, 314,864.55 and 139,752.90 is: 209,284.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,255.30 : 314,864.55 = 139,752.90 : x
  2. Step 2: Convert to fraction form
    210,255.30/314,864.55 = 139,752.90/x
  3. Step 3: Cross multiply
    210,255.30x = 314,864.55 × 139,752.90
  4. Step 4: Simplify right side
    210,255.30x = 44,003,233,969.70
  5. Step 5: Solve for x
    x = 44,003,233,969.70/210,255.30
  6. Step 6: Final answer
    x = 209,284.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.