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Finding the Fourth Proportional to 640,058.88, 883,288.64 and 353,572.96

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Solution

The fourth proportional to 640,058.88, 883,288.64 and 353,572.96 is: 487,934.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,058.88 : 883,288.64 = 353,572.96 : x
  2. Step 2: Convert to fraction form
    640,058.88/883,288.64 = 353,572.96/x
  3. Step 3: Cross multiply
    640,058.88x = 883,288.64 × 353,572.96
  4. Step 4: Simplify right side
    640,058.88x = 312,306,978,979.17
  5. Step 5: Solve for x
    x = 312,306,978,979.17/640,058.88
  6. Step 6: Final answer
    x = 487,934.76

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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.