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Finding the Fourth Proportional to 642,889, 964,333.50 and 248,905

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Solution

The fourth proportional to 642,889, 964,333.50 and 248,905 is: 373,357.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,889 : 964,333.50 = 248,905 : x
  2. Step 2: Convert to fraction form
    642,889/964,333.50 = 248,905/x
  3. Step 3: Cross multiply
    642,889x = 964,333.50 × 248,905
  4. Step 4: Simplify right side
    642,889x = 240,027,429,817.50
  5. Step 5: Solve for x
    x = 240,027,429,817.50/642,889
  6. Step 6: Final answer
    x = 373,357.50

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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.