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Finding the Fourth Proportional to 381,518.60, 572,537.10 and 213,038.60

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Solution

The fourth proportional to 381,518.60, 572,537.10 and 213,038.60 is: 319,702.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,518.60 : 572,537.10 = 213,038.60 : x
  2. Step 2: Convert to fraction form
    381,518.60/572,537.10 = 213,038.60/x
  3. Step 3: Cross multiply
    381,518.60x = 572,537.10 × 213,038.60
  4. Step 4: Simplify right side
    381,518.60x = 121,972,502,232.06
  5. Step 5: Solve for x
    x = 121,972,502,232.06/381,518.60
  6. Step 6: Final answer
    x = 319,702.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.