Home / 645,433.88-890,720.70-355,058.24

Finding the Fourth Proportional to 645,433.88, 890,720.70 and 355,058.24

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Solution

The fourth proportional to 645,433.88, 890,720.70 and 355,058.24 is: 489,992.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,433.88 : 890,720.70 = 355,058.24 : x
  2. Step 2: Convert to fraction form
    645,433.88/890,720.70 = 355,058.24/x
  3. Step 3: Cross multiply
    645,433.88x = 890,720.70 × 355,058.24
  4. Step 4: Simplify right side
    645,433.88x = 316,257,724,073.57
  5. Step 5: Solve for x
    x = 316,257,724,073.57/645,433.88
  6. Step 6: Final answer
    x = 489,992.44

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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.