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Finding the Fourth Proportional to 321,313.36, 443,018.28 and 260,712.40

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Solution

The fourth proportional to 321,313.36, 443,018.28 and 260,712.40 is: 359,463.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,313.36 : 443,018.28 = 260,712.40 : x
  2. Step 2: Convert to fraction form
    321,313.36/443,018.28 = 260,712.40/x
  3. Step 3: Cross multiply
    321,313.36x = 443,018.28 × 260,712.40
  4. Step 4: Simplify right side
    321,313.36x = 115,500,359,022.67
  5. Step 5: Solve for x
    x = 115,500,359,022.67/321,313.36
  6. Step 6: Final answer
    x = 359,463.29

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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.