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Finding the Fourth Proportional to 553,637.44, 763,861.64 and 311,835.52

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Solution

The fourth proportional to 553,637.44, 763,861.64 and 311,835.52 is: 430,244.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,637.44 : 763,861.64 = 311,835.52 : x
  2. Step 2: Convert to fraction form
    553,637.44/763,861.64 = 311,835.52/x
  3. Step 3: Cross multiply
    553,637.44x = 763,861.64 × 311,835.52
  4. Step 4: Simplify right side
    553,637.44x = 238,199,191,717.45
  5. Step 5: Solve for x
    x = 238,199,191,717.45/553,637.44
  6. Step 6: Final answer
    x = 430,244.01

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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.