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Finding the Fourth Proportional to 659,939.28, 910,716.18 and 358,133.28

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Solution

The fourth proportional to 659,939.28, 910,716.18 and 358,133.28 is: 494,223.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,939.28 : 910,716.18 = 358,133.28 : x
  2. Step 2: Convert to fraction form
    659,939.28/910,716.18 = 358,133.28/x
  3. Step 3: Cross multiply
    659,939.28x = 910,716.18 × 358,133.28
  4. Step 4: Simplify right side
    659,939.28x = 326,157,772,692.47
  5. Step 5: Solve for x
    x = 326,157,772,692.47/659,939.28
  6. Step 6: Final answer
    x = 494,223.91

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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.