Home / 641,300.08-885,020.20-354,815.52

Finding the Fourth Proportional to 641,300.08, 885,020.20 and 354,815.52

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Solution

The fourth proportional to 641,300.08, 885,020.20 and 354,815.52 is: 489,659.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,300.08 : 885,020.20 = 354,815.52 : x
  2. Step 2: Convert to fraction form
    641,300.08/885,020.20 = 354,815.52/x
  3. Step 3: Cross multiply
    641,300.08x = 885,020.20 × 354,815.52
  4. Step 4: Simplify right side
    641,300.08x = 314,018,902,473.50
  5. Step 5: Solve for x
    x = 314,018,902,473.50/641,300.08
  6. Step 6: Final answer
    x = 489,659.85

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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.