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Finding the Fourth Proportional to 553,248.23, 763,555.31 and 311,578.04

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Solution

The fourth proportional to 553,248.23, 763,555.31 and 311,578.04 is: 430,018.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,248.23 : 763,555.31 = 311,578.04 : x
  2. Step 2: Convert to fraction form
    553,248.23/763,555.31 = 311,578.04/x
  3. Step 3: Cross multiply
    553,248.23x = 763,555.31 × 311,578.04
  4. Step 4: Simplify right side
    553,248.23x = 237,907,065,363.50
  5. Step 5: Solve for x
    x = 237,907,065,363.50/553,248.23
  6. Step 6: Final answer
    x = 430,018.67

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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.