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Finding the Fourth Proportional to 368,663.79, 508,756.15 and 215,731.38

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Solution

The fourth proportional to 368,663.79, 508,756.15 and 215,731.38 is: 297,709.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,663.79 : 508,756.15 = 215,731.38 : x
  2. Step 2: Convert to fraction form
    368,663.79/508,756.15 = 215,731.38/x
  3. Step 3: Cross multiply
    368,663.79x = 508,756.15 × 215,731.38
  4. Step 4: Simplify right side
    368,663.79x = 109,754,666,322.99
  5. Step 5: Solve for x
    x = 109,754,666,322.99/368,663.79
  6. Step 6: Final answer
    x = 297,709.37

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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.