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Finding the Fourth Proportional to 667,075.71, 920,565.07 and 361,152.30

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Solution

The fourth proportional to 667,075.71, 920,565.07 and 361,152.30 is: 498,390.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,075.71 : 920,565.07 = 361,152.30 : x
  2. Step 2: Convert to fraction form
    667,075.71/920,565.07 = 361,152.30/x
  3. Step 3: Cross multiply
    667,075.71x = 920,565.07 × 361,152.30
  4. Step 4: Simplify right side
    667,075.71x = 332,464,187,302.57
  5. Step 5: Solve for x
    x = 332,464,187,302.57/667,075.71
  6. Step 6: Final answer
    x = 498,390.49

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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.