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Finding the Fourth Proportional to 710,145.73, 979,999.53 and 387,855.84

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Solution

The fourth proportional to 710,145.73, 979,999.53 and 387,855.84 is: 535,240.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,145.73 : 979,999.53 = 387,855.84 : x
  2. Step 2: Convert to fraction form
    710,145.73/979,999.53 = 387,855.84/x
  3. Step 3: Cross multiply
    710,145.73x = 979,999.53 × 387,855.84
  4. Step 4: Simplify right side
    710,145.73x = 380,098,540,907.76
  5. Step 5: Solve for x
    x = 380,098,540,907.76/710,145.73
  6. Step 6: Final answer
    x = 535,240.20

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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.