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Finding the Fourth Proportional to 553,213.99, 763,372.11 and 311,490.35

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Solution

The fourth proportional to 553,213.99, 763,372.11 and 311,490.35 is: 429,821.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,213.99 : 763,372.11 = 311,490.35 : x
  2. Step 2: Convert to fraction form
    553,213.99/763,372.11 = 311,490.35/x
  3. Step 3: Cross multiply
    553,213.99x = 763,372.11 × 311,490.35
  4. Step 4: Simplify right side
    553,213.99x = 237,783,045,724.14
  5. Step 5: Solve for x
    x = 237,783,045,724.14/553,213.99
  6. Step 6: Final answer
    x = 429,821.10

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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.