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Finding the Fourth Proportional to 617,218.74, 851,763.12 and 345,291.18

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Solution

The fourth proportional to 617,218.74, 851,763.12 and 345,291.18 is: 476,502.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,218.74 : 851,763.12 = 345,291.18 : x
  2. Step 2: Convert to fraction form
    617,218.74/851,763.12 = 345,291.18/x
  3. Step 3: Cross multiply
    617,218.74x = 851,763.12 × 345,291.18
  4. Step 4: Simplify right side
    617,218.74x = 294,106,295,256.42
  5. Step 5: Solve for x
    x = 294,106,295,256.42/617,218.74
  6. Step 6: Final answer
    x = 476,502.54

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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.