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Finding the Fourth Proportional to 403,422.12, 555,697.26 and 307,762.74

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Solution

The fourth proportional to 403,422.12, 555,697.26 and 307,762.74 is: 423,930.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,422.12 : 555,697.26 = 307,762.74 : x
  2. Step 2: Convert to fraction form
    403,422.12/555,697.26 = 307,762.74/x
  3. Step 3: Cross multiply
    403,422.12x = 555,697.26 × 307,762.74
  4. Step 4: Simplify right side
    403,422.12x = 171,022,911,348.09
  5. Step 5: Solve for x
    x = 171,022,911,348.09/403,422.12
  6. Step 6: Final answer
    x = 423,930.43

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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.