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Finding the Fourth Proportional to 557,600.40, 782,215.20 and 557,600.40

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Solution

The fourth proportional to 557,600.40, 782,215.20 and 557,600.40 is: 782,215.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,600.40 : 782,215.20 = 557,600.40 : x
  2. Step 2: Convert to fraction form
    557,600.40/782,215.20 = 557,600.40/x
  3. Step 3: Cross multiply
    557,600.40x = 782,215.20 × 557,600.40
  4. Step 4: Simplify right side
    557,600.40x = 436,163,508,406.08
  5. Step 5: Solve for x
    x = 436,163,508,406.08/557,600.40
  6. Step 6: Final answer
    x = 782,215.20

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Half scale
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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 (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.