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Finding the Fourth Proportional to 693,048.93, 956,410.85 and 387,138.20

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Solution

The fourth proportional to 693,048.93, 956,410.85 and 387,138.20 is: 534,252.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,048.93 : 956,410.85 = 387,138.20 : x
  2. Step 2: Convert to fraction form
    693,048.93/956,410.85 = 387,138.20/x
  3. Step 3: Cross multiply
    693,048.93x = 956,410.85 × 387,138.20
  4. Step 4: Simplify right side
    693,048.93x = 370,263,170,602.75
  5. Step 5: Solve for x
    x = 370,263,170,602.75/693,048.93
  6. Step 6: Final answer
    x = 534,252.57

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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.