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Finding the Fourth Proportional to 628,476.56, 867,317.18 and 356,555.91

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Solution

The fourth proportional to 628,476.56, 867,317.18 and 356,555.91 is: 492,058.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,476.56 : 867,317.18 = 356,555.91 : x
  2. Step 2: Convert to fraction form
    628,476.56/867,317.18 = 356,555.91/x
  3. Step 3: Cross multiply
    628,476.56x = 867,317.18 × 356,555.91
  4. Step 4: Simplify right side
    628,476.56x = 309,247,064,590.75
  5. Step 5: Solve for x
    x = 309,247,064,590.75/628,476.56
  6. Step 6: Final answer
    x = 492,058.24

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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.