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Finding the Fourth Proportional to 710,149.16, 979,990.65 and 387,860.51

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Solution

The fourth proportional to 710,149.16, 979,990.65 and 387,860.51 is: 535,239.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,149.16 : 979,990.65 = 387,860.51 : x
  2. Step 2: Convert to fraction form
    710,149.16/979,990.65 = 387,860.51/x
  3. Step 3: Cross multiply
    710,149.16x = 979,990.65 × 387,860.51
  4. Step 4: Simplify right side
    710,149.16x = 380,099,668,404.28
  5. Step 5: Solve for x
    x = 380,099,668,404.28/710,149.16
  6. Step 6: Final answer
    x = 535,239.20

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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.