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Finding the Fourth Proportional to 489,642.80, 734,464.20 and 371,544.80

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Solution

The fourth proportional to 489,642.80, 734,464.20 and 371,544.80 is: 557,317.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,642.80 : 734,464.20 = 371,544.80 : x
  2. Step 2: Convert to fraction form
    489,642.80/734,464.20 = 371,544.80/x
  3. Step 3: Cross multiply
    489,642.80x = 734,464.20 × 371,544.80
  4. Step 4: Simplify right side
    489,642.80x = 272,886,354,296.16
  5. Step 5: Solve for x
    x = 272,886,354,296.16/489,642.80
  6. Step 6: Final answer
    x = 557,317.20

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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.