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Finding the Fourth Proportional to 402,090.39, 554,891.11 and 218,328.86

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Solution

The fourth proportional to 402,090.39, 554,891.11 and 218,328.86 is: 301,297.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,090.39 : 554,891.11 = 218,328.86 : x
  2. Step 2: Convert to fraction form
    402,090.39/554,891.11 = 218,328.86/x
  3. Step 3: Cross multiply
    402,090.39x = 554,891.11 × 218,328.86
  4. Step 4: Simplify right side
    402,090.39x = 121,148,740,695.98
  5. Step 5: Solve for x
    x = 121,148,740,695.98/402,090.39
  6. Step 6: Final answer
    x = 301,297.28

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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.