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Finding the Fourth Proportional to 642,495.70, 963,743.55 and 169,228.90

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Solution

The fourth proportional to 642,495.70, 963,743.55 and 169,228.90 is: 253,843.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,495.70 : 963,743.55 = 169,228.90 : x
  2. Step 2: Convert to fraction form
    642,495.70/963,743.55 = 169,228.90/x
  3. Step 3: Cross multiply
    642,495.70x = 963,743.55 × 169,228.90
  4. Step 4: Simplify right side
    642,495.70x = 163,093,260,848.60
  5. Step 5: Solve for x
    x = 163,093,260,848.60/642,495.70
  6. Step 6: Final answer
    x = 253,843.35

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Double 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.