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Finding the Fourth Proportional to 710,143.13, 979,982.37 and 387,854.51

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Solution

The fourth proportional to 710,143.13, 979,982.37 and 387,854.51 is: 535,230.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,143.13 : 979,982.37 = 387,854.51 : x
  2. Step 2: Convert to fraction form
    710,143.13/979,982.37 = 387,854.51/x
  3. Step 3: Cross multiply
    710,143.13x = 979,982.37 × 387,854.51
  4. Step 4: Simplify right side
    710,143.13x = 380,090,577,025.08
  5. Step 5: Solve for x
    x = 380,090,577,025.08/710,143.13
  6. Step 6: Final answer
    x = 535,230.94

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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.