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Finding the Fourth Proportional to 456,401.40, 684,018.90 and 219,233.40

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Solution

The fourth proportional to 456,401.40, 684,018.90 and 219,233.40 is: 328,569.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,401.40 : 684,018.90 = 219,233.40 : x
  2. Step 2: Convert to fraction form
    456,401.40/684,018.90 = 219,233.40/x
  3. Step 3: Cross multiply
    456,401.40x = 684,018.90 × 219,233.40
  4. Step 4: Simplify right side
    456,401.40x = 149,959,789,111.26
  5. Step 5: Solve for x
    x = 149,959,789,111.26/456,401.40
  6. Step 6: Final answer
    x = 328,569.96

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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.