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Finding the Fourth Proportional to 717,371.64, 989,934.36 and 395,018.76

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Solution

The fourth proportional to 717,371.64, 989,934.36 and 395,018.76 is: 545,104.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,371.64 : 989,934.36 = 395,018.76 : x
  2. Step 2: Convert to fraction form
    717,371.64/989,934.36 = 395,018.76/x
  3. Step 3: Cross multiply
    717,371.64x = 989,934.36 × 395,018.76
  4. Step 4: Simplify right side
    717,371.64x = 391,042,643,368.59
  5. Step 5: Solve for x
    x = 391,042,643,368.59/717,371.64
  6. Step 6: Final answer
    x = 545,104.69

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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.