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Finding the Fourth Proportional to 418,405.58, 577,677.76 and 321,436.74

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Solution

The fourth proportional to 418,405.58, 577,677.76 and 321,436.74 is: 443,796.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,405.58 : 577,677.76 = 321,436.74 : x
  2. Step 2: Convert to fraction form
    418,405.58/577,677.76 = 321,436.74/x
  3. Step 3: Cross multiply
    418,405.58x = 577,677.76 × 321,436.74
  4. Step 4: Simplify right side
    418,405.58x = 185,686,855,944.90
  5. Step 5: Solve for x
    x = 185,686,855,944.90/418,405.58
  6. Step 6: Final answer
    x = 443,796.32

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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.