Home / 864,423.72-1,296,355.20-287,893.56

Finding the Fourth Proportional to 864,423.72, 1,296,355.20 and 287,893.56

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Solution

The fourth proportional to 864,423.72, 1,296,355.20 and 287,893.56 is: 431,746.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,423.72 : 1,296,355.20 = 287,893.56 : x
  2. Step 2: Convert to fraction form
    864,423.72/1,296,355.20 = 287,893.56/x
  3. Step 3: Cross multiply
    864,423.72x = 1,296,355.20 × 287,893.56
  4. Step 4: Simplify right side
    864,423.72x = 373,212,313,552.51
  5. Step 5: Solve for x
    x = 373,212,313,552.51/864,423.72
  6. Step 6: Final answer
    x = 431,746.96

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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.