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Finding the Fourth Proportional to 802,279.40, 1,203,419.10 and 644,815.40

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Solution

The fourth proportional to 802,279.40, 1,203,419.10 and 644,815.40 is: 967,223.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    802,279.40 : 1,203,419.10 = 644,815.40 : x
  2. Step 2: Convert to fraction form
    802,279.40/1,203,419.10 = 644,815.40/x
  3. Step 3: Cross multiply
    802,279.40x = 1,203,419.10 × 644,815.40
  4. Step 4: Simplify right side
    802,279.40x = 775,983,168,334.14
  5. Step 5: Solve for x
    x = 775,983,168,334.14/802,279.40
  6. Step 6: Final answer
    x = 967,223.10

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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.