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Finding the Fourth Proportional to 553,347.10, 763,639.50 and 308,353.96

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Solution

The fourth proportional to 553,347.10, 763,639.50 and 308,353.96 is: 425,539.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,347.10 : 763,639.50 = 308,353.96 : x
  2. Step 2: Convert to fraction form
    553,347.10/763,639.50 = 308,353.96/x
  3. Step 3: Cross multiply
    553,347.10x = 763,639.50 × 308,353.96
  4. Step 4: Simplify right side
    553,347.10x = 235,471,263,837.42
  5. Step 5: Solve for x
    x = 235,471,263,837.42/553,347.10
  6. Step 6: Final answer
    x = 425,539.89

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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.