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Finding the Fourth Proportional to 693,342.40, 956,795.34 and 387,400

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Solution

The fourth proportional to 693,342.40, 956,795.34 and 387,400 is: 534,602.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,342.40 : 956,795.34 = 387,400 : x
  2. Step 2: Convert to fraction form
    693,342.40/956,795.34 = 387,400/x
  3. Step 3: Cross multiply
    693,342.40x = 956,795.34 × 387,400
  4. Step 4: Simplify right side
    693,342.40x = 370,662,514,716
  5. Step 5: Solve for x
    x = 370,662,514,716/693,342.40
  6. Step 6: Final answer
    x = 534,602.41

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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.