Home / 645,135.44-890,309.72-354,769.12

Finding the Fourth Proportional to 645,135.44, 890,309.72 and 354,769.12

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Solution

The fourth proportional to 645,135.44, 890,309.72 and 354,769.12 is: 489,593.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,135.44 : 890,309.72 = 354,769.12 : x
  2. Step 2: Convert to fraction form
    645,135.44/890,309.72 = 354,769.12/x
  3. Step 3: Cross multiply
    645,135.44x = 890,309.72 × 354,769.12
  4. Step 4: Simplify right side
    645,135.44x = 315,854,389,666.45
  5. Step 5: Solve for x
    x = 315,854,389,666.45/645,135.44
  6. Step 6: Final answer
    x = 489,593.92

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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.