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Finding the Fourth Proportional to 628,529.65, 867,390.49 and 356,609

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Solution

The fourth proportional to 628,529.65, 867,390.49 and 356,609 is: 492,131.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,529.65 : 867,390.49 = 356,609 : x
  2. Step 2: Convert to fraction form
    628,529.65/867,390.49 = 356,609/x
  3. Step 3: Cross multiply
    628,529.65x = 867,390.49 × 356,609
  4. Step 4: Simplify right side
    628,529.65x = 309,319,255,248.41
  5. Step 5: Solve for x
    x = 309,319,255,248.41/628,529.65
  6. Step 6: Final answer
    x = 492,131.53

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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.