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Finding the Fourth Proportional to 659,139.02, 909,619.02 and 387,218.38

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Solution

The fourth proportional to 659,139.02, 909,619.02 and 387,218.38 is: 534,365.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,139.02 : 909,619.02 = 387,218.38 : x
  2. Step 2: Convert to fraction form
    659,139.02/909,619.02 = 387,218.38/x
  3. Step 3: Cross multiply
    659,139.02x = 909,619.02 × 387,218.38
  4. Step 4: Simplify right side
    659,139.02x = 352,221,203,341.59
  5. Step 5: Solve for x
    x = 352,221,203,341.59/659,139.02
  6. Step 6: Final answer
    x = 534,365.58

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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.