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Finding the Fourth Proportional to 827,448.40, 1,142,027.40 and 487,896.40

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Solution

The fourth proportional to 827,448.40, 1,142,027.40 and 487,896.40 is: 673,384.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,448.40 : 1,142,027.40 = 487,896.40 : x
  2. Step 2: Convert to fraction form
    827,448.40/1,142,027.40 = 487,896.40/x
  3. Step 3: Cross multiply
    827,448.40x = 1,142,027.40 × 487,896.40
  4. Step 4: Simplify right side
    827,448.40x = 557,191,057,161.36
  5. Step 5: Solve for x
    x = 557,191,057,161.36/827,448.40
  6. Step 6: Final answer
    x = 673,384.66

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.