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Finding the Fourth Proportional to 864,398.70, 1,296,598.05 and 550,248.30

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Solution

The fourth proportional to 864,398.70, 1,296,598.05 and 550,248.30 is: 825,372.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,398.70 : 1,296,598.05 = 550,248.30 : x
  2. Step 2: Convert to fraction form
    864,398.70/1,296,598.05 = 550,248.30/x
  3. Step 3: Cross multiply
    864,398.70x = 1,296,598.05 × 550,248.30
  4. Step 4: Simplify right side
    864,398.70x = 713,450,872,795.82
  5. Step 5: Solve for x
    x = 713,450,872,795.82/864,398.70
  6. Step 6: Final answer
    x = 825,372.45

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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.