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Finding the Fourth Proportional to 662,145.72, 913,697.82 and 371,690.76

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Solution

The fourth proportional to 662,145.72, 913,697.82 and 371,690.76 is: 512,897.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,145.72 : 913,697.82 = 371,690.76 : x
  2. Step 2: Convert to fraction form
    662,145.72/913,697.82 = 371,690.76/x
  3. Step 3: Cross multiply
    662,145.72x = 913,697.82 × 371,690.76
  4. Step 4: Simplify right side
    662,145.72x = 339,613,037,126.14
  5. Step 5: Solve for x
    x = 339,613,037,126.14/662,145.72
  6. Step 6: Final answer
    x = 512,897.73

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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.