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Finding the Fourth Proportional to 710,147.14, 979,987.88 and 387,858.50

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Solution

The fourth proportional to 710,147.14, 979,987.88 and 387,858.50 is: 535,236.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,147.14 : 979,987.88 = 387,858.50 : x
  2. Step 2: Convert to fraction form
    710,147.14/979,987.88 = 387,858.50/x
  3. Step 3: Cross multiply
    710,147.14x = 979,987.88 × 387,858.50
  4. Step 4: Simplify right side
    710,147.14x = 380,096,629,154.98
  5. Step 5: Solve for x
    x = 380,096,629,154.98/710,147.14
  6. Step 6: Final answer
    x = 535,236.44

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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.