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Finding the Fourth Proportional to 434,578.80, 651,479.40 and 284,890.80

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Solution

The fourth proportional to 434,578.80, 651,479.40 and 284,890.80 is: 427,081.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,578.80 : 651,479.40 = 284,890.80 : x
  2. Step 2: Convert to fraction form
    434,578.80/651,479.40 = 284,890.80/x
  3. Step 3: Cross multiply
    434,578.80x = 651,479.40 × 284,890.80
  4. Step 4: Simplify right side
    434,578.80x = 185,600,487,449.52
  5. Step 5: Solve for x
    x = 185,600,487,449.52/434,578.80
  6. Step 6: Final answer
    x = 427,081.32

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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.