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Finding the Fourth Proportional to 645,211, 890,391.18 and 362,587

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Solution

The fourth proportional to 645,211, 890,391.18 and 362,587 is: 500,370.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,211 : 890,391.18 = 362,587 : x
  2. Step 2: Convert to fraction form
    645,211/890,391.18 = 362,587/x
  3. Step 3: Cross multiply
    645,211x = 890,391.18 × 362,587
  4. Step 4: Simplify right side
    645,211x = 322,844,266,782.66
  5. Step 5: Solve for x
    x = 322,844,266,782.66/645,211
  6. Step 6: Final answer
    x = 500,370.06

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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.