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Finding the Fourth Proportional to 314,865.20, 472,297.80 and 128,010.80

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Solution

The fourth proportional to 314,865.20, 472,297.80 and 128,010.80 is: 192,016.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,865.20 : 472,297.80 = 128,010.80 : x
  2. Step 2: Convert to fraction form
    314,865.20/472,297.80 = 128,010.80/x
  3. Step 3: Cross multiply
    314,865.20x = 472,297.80 × 128,010.80
  4. Step 4: Simplify right side
    314,865.20x = 60,459,219,216.24
  5. Step 5: Solve for x
    x = 60,459,219,216.24/314,865.20
  6. Step 6: Final answer
    x = 192,016.20

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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.