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Finding the Fourth Proportional to 643,208.48, 887,484.64 and 371,218.72

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Solution

The fourth proportional to 643,208.48, 887,484.64 and 371,218.72 is: 512,199.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,208.48 : 887,484.64 = 371,218.72 : x
  2. Step 2: Convert to fraction form
    643,208.48/887,484.64 = 371,218.72/x
  3. Step 3: Cross multiply
    643,208.48x = 887,484.64 × 371,218.72
  4. Step 4: Simplify right side
    643,208.48x = 329,450,912,080.46
  5. Step 5: Solve for x
    x = 329,450,912,080.46/643,208.48
  6. Step 6: Final answer
    x = 512,199.27

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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.