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Finding the Fourth Proportional to 455,915.78, 684,070.50 and 245,511.80

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Solution

The fourth proportional to 455,915.78, 684,070.50 and 245,511.80 is: 368,373.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,915.78 : 684,070.50 = 245,511.80 : x
  2. Step 2: Convert to fraction form
    455,915.78/684,070.50 = 245,511.80/x
  3. Step 3: Cross multiply
    455,915.78x = 684,070.50 × 245,511.80
  4. Step 4: Simplify right side
    455,915.78x = 167,947,379,781.90
  5. Step 5: Solve for x
    x = 167,947,379,781.90/455,915.78
  6. Step 6: Final answer
    x = 368,373.69

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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.