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Finding the Fourth Proportional to 387,175.40, 534,370.48 and 289,548.40

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Solution

The fourth proportional to 387,175.40, 534,370.48 and 289,548.40 is: 399,627.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,175.40 : 534,370.48 = 289,548.40 : x
  2. Step 2: Convert to fraction form
    387,175.40/534,370.48 = 289,548.40/x
  3. Step 3: Cross multiply
    387,175.40x = 534,370.48 × 289,548.40
  4. Step 4: Simplify right side
    387,175.40x = 154,726,117,491.23
  5. Step 5: Solve for x
    x = 154,726,117,491.23/387,175.40
  6. Step 6: Final answer
    x = 399,627.97

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1.5x scale

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.