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Finding the Fourth Proportional to 1,237.59, 1,856.85 and 415.98

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Solution

The fourth proportional to 1,237.59, 1,856.85 and 415.98 is: 624.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.59 : 1,856.85 = 415.98 : x
  2. Step 2: Convert to fraction form
    1,237.59/1,856.85 = 415.98/x
  3. Step 3: Cross multiply
    1,237.59x = 1,856.85 × 415.98
  4. Step 4: Simplify right side
    1,237.59x = 772,412.46
  5. Step 5: Solve for x
    x = 772,412.46/1,237.59
  6. Step 6: Final answer
    x = 624.13

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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.