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Finding the Fourth Proportional to 555,479.73, 765,821.12 and 417,072.87

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Solution

The fourth proportional to 555,479.73, 765,821.12 and 417,072.87 is: 575,004.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,479.73 : 765,821.12 = 417,072.87 : x
  2. Step 2: Convert to fraction form
    555,479.73/765,821.12 = 417,072.87/x
  3. Step 3: Cross multiply
    555,479.73x = 765,821.12 × 417,072.87
  4. Step 4: Simplify right side
    555,479.73x = 319,403,210,339.65
  5. Step 5: Solve for x
    x = 319,403,210,339.65/555,479.73
  6. Step 6: Final answer
    x = 575,004.26

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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.