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Finding the Fourth Proportional to 535,908.72, 739,526.87 and 318,126.70

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Solution

The fourth proportional to 535,908.72, 739,526.87 and 318,126.70 is: 438,998.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    535,908.72 : 739,526.87 = 318,126.70 : x
  2. Step 2: Convert to fraction form
    535,908.72/739,526.87 = 318,126.70/x
  3. Step 3: Cross multiply
    535,908.72x = 739,526.87 × 318,126.70
  4. Step 4: Simplify right side
    535,908.72x = 235,263,242,714.43
  5. Step 5: Solve for x
    x = 235,263,242,714.43/535,908.72
  6. Step 6: Final answer
    x = 438,998.72

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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.