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Finding the Fourth Proportional to 641,483.80, 885,275.43 and 355,003.98

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Solution

The fourth proportional to 641,483.80, 885,275.43 and 355,003.98 is: 489,920.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,483.80 : 885,275.43 = 355,003.98 : x
  2. Step 2: Convert to fraction form
    641,483.80/885,275.43 = 355,003.98/x
  3. Step 3: Cross multiply
    641,483.80x = 885,275.43 × 355,003.98
  4. Step 4: Simplify right side
    641,483.80x = 314,276,296,395.16
  5. Step 5: Solve for x
    x = 314,276,296,395.16/641,483.80
  6. Step 6: Final answer
    x = 489,920.86

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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.