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Finding the Fourth Proportional to 643,315.50, 965,014.56 and 169,988.76

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Solution

The fourth proportional to 643,315.50, 965,014.56 and 169,988.76 is: 254,994.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,315.50 : 965,014.56 = 169,988.76 : x
  2. Step 2: Convert to fraction form
    643,315.50/965,014.56 = 169,988.76/x
  3. Step 3: Cross multiply
    643,315.50x = 965,014.56 × 169,988.76
  4. Step 4: Simplify right side
    643,315.50x = 164,041,628,436.35
  5. Step 5: Solve for x
    x = 164,041,628,436.35/643,315.50
  6. Step 6: Final answer
    x = 254,994.06

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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.