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Finding the Fourth Proportional to 553,522.36, 763,759.32 and 311,753.20

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Solution

The fourth proportional to 553,522.36, 763,759.32 and 311,753.20 is: 430,162.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,522.36 : 763,759.32 = 311,753.20 : x
  2. Step 2: Convert to fraction form
    553,522.36/763,759.32 = 311,753.20/x
  3. Step 3: Cross multiply
    553,522.36x = 763,759.32 × 311,753.20
  4. Step 4: Simplify right side
    553,522.36x = 238,104,412,039.82
  5. Step 5: Solve for x
    x = 238,104,412,039.82/553,522.36
  6. Step 6: Final answer
    x = 430,162.23

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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.