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Finding the Fourth Proportional to 387,391.32, 534,563.30 and 358,826.37

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Solution

The fourth proportional to 387,391.32, 534,563.30 and 358,826.37 is: 495,146.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,391.32 : 534,563.30 = 358,826.37 : x
  2. Step 2: Convert to fraction form
    387,391.32/534,563.30 = 358,826.37/x
  3. Step 3: Cross multiply
    387,391.32x = 534,563.30 × 358,826.37
  4. Step 4: Simplify right side
    387,391.32x = 191,815,406,680.09
  5. Step 5: Solve for x
    x = 191,815,406,680.09/387,391.32
  6. Step 6: Final answer
    x = 495,146.37

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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.