Home / 645,125.04-890,295.37-354,758.76

Finding the Fourth Proportional to 645,125.04, 890,295.37 and 354,758.76

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Solution

The fourth proportional to 645,125.04, 890,295.37 and 354,758.76 is: 489,579.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,125.04 : 890,295.37 = 354,758.76 : x
  2. Step 2: Convert to fraction form
    645,125.04/890,295.37 = 354,758.76/x
  3. Step 3: Cross multiply
    645,125.04x = 890,295.37 × 354,758.76
  4. Step 4: Simplify right side
    645,125.04x = 315,840,080,608.04
  5. Step 5: Solve for x
    x = 315,840,080,608.04/645,125.04
  6. Step 6: Final answer
    x = 489,579.63

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Double scale
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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.