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Finding the Fourth Proportional to 426,547.44, 639,366.48 and 321,040.08

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Solution

The fourth proportional to 426,547.44, 639,366.48 and 321,040.08 is: 481,217.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,547.44 : 639,366.48 = 321,040.08 : x
  2. Step 2: Convert to fraction form
    426,547.44/639,366.48 = 321,040.08/x
  3. Step 3: Cross multiply
    426,547.44x = 639,366.48 × 321,040.08
  4. Step 4: Simplify right side
    426,547.44x = 205,262,265,888.52
  5. Step 5: Solve for x
    x = 205,262,265,888.52/426,547.44
  6. Step 6: Final answer
    x = 481,217.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.