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Finding the Fourth Proportional to 375,697.72, 563,486.64 and 138,986.56

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Solution

The fourth proportional to 375,697.72, 563,486.64 and 138,986.56 is: 208,457.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,697.72 : 563,486.64 = 138,986.56 : x
  2. Step 2: Convert to fraction form
    375,697.72/563,486.64 = 138,986.56/x
  3. Step 3: Cross multiply
    375,697.72x = 563,486.64 × 138,986.56
  4. Step 4: Simplify right side
    375,697.72x = 78,317,069,699.56
  5. Step 5: Solve for x
    x = 78,317,069,699.56/375,697.72
  6. Step 6: Final answer
    x = 208,457.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.