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Finding the Fourth Proportional to 1,572.99, 2,359.48 and 418.74

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Solution

The fourth proportional to 1,572.99, 2,359.48 and 418.74 is: 628.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.99 : 2,359.48 = 418.74 : x
  2. Step 2: Convert to fraction form
    1,572.99/2,359.48 = 418.74/x
  3. Step 3: Cross multiply
    1,572.99x = 2,359.48 × 418.74
  4. Step 4: Simplify right side
    1,572.99x = 987,994.76
  5. Step 5: Solve for x
    x = 987,994.76/1,572.99
  6. Step 6: Final answer
    x = 628.10

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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.