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Finding the Fourth Proportional to 641,758.48, 885,598.80 and 355,261.48

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Solution

The fourth proportional to 641,758.48, 885,598.80 and 355,261.48 is: 490,245.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,758.48 : 885,598.80 = 355,261.48 : x
  2. Step 2: Convert to fraction form
    641,758.48/885,598.80 = 355,261.48/x
  3. Step 3: Cross multiply
    641,758.48x = 885,598.80 × 355,261.48
  4. Step 4: Simplify right side
    641,758.48x = 314,619,140,374.22
  5. Step 5: Solve for x
    x = 314,619,140,374.22/641,758.48
  6. Step 6: Final answer
    x = 490,245.40

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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.