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Finding the Fourth Proportional to 313,386.20, 469,301.70 and 251,178.20

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Solution

The fourth proportional to 313,386.20, 469,301.70 and 251,178.20 is: 376,144.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,386.20 : 469,301.70 = 251,178.20 : x
  2. Step 2: Convert to fraction form
    313,386.20/469,301.70 = 251,178.20/x
  3. Step 3: Cross multiply
    313,386.20x = 469,301.70 × 251,178.20
  4. Step 4: Simplify right side
    313,386.20x = 117,878,356,262.94
  5. Step 5: Solve for x
    x = 117,878,356,262.94/313,386.20
  6. Step 6: Final answer
    x = 376,144.06

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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.