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Finding the Fourth Proportional to 642,893, 964,339.50 and 248,909

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Solution

The fourth proportional to 642,893, 964,339.50 and 248,909 is: 373,363.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,893 : 964,339.50 = 248,909 : x
  2. Step 2: Convert to fraction form
    642,893/964,339.50 = 248,909/x
  3. Step 3: Cross multiply
    642,893x = 964,339.50 × 248,909
  4. Step 4: Simplify right side
    642,893x = 240,032,780,605.50
  5. Step 5: Solve for x
    x = 240,032,780,605.50/642,893
  6. Step 6: Final answer
    x = 373,363.50

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Half scale
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Similar ratio
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1.5x scale

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.