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Finding the Fourth Proportional to 644,986.31, 890,058.42 and 354,595.77

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Solution

The fourth proportional to 644,986.31, 890,058.42 and 354,595.77 is: 489,329.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,986.31 : 890,058.42 = 354,595.77 : x
  2. Step 2: Convert to fraction form
    644,986.31/890,058.42 = 354,595.77/x
  3. Step 3: Cross multiply
    644,986.31x = 890,058.42 × 354,595.77
  4. Step 4: Simplify right side
    644,986.31x = 315,610,950,784.88
  5. Step 5: Solve for x
    x = 315,610,950,784.88/644,986.31
  6. Step 6: Final answer
    x = 489,329.69

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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.