Home / 685,136.70-1,027,705.05-657,143.10

Finding the Fourth Proportional to 685,136.70, 1,027,705.05 and 657,143.10

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Solution

The fourth proportional to 685,136.70, 1,027,705.05 and 657,143.10 is: 985,714.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,136.70 : 1,027,705.05 = 657,143.10 : x
  2. Step 2: Convert to fraction form
    685,136.70/1,027,705.05 = 657,143.10/x
  3. Step 3: Cross multiply
    685,136.70x = 1,027,705.05 × 657,143.10
  4. Step 4: Simplify right side
    685,136.70x = 675,349,282,442.66
  5. Step 5: Solve for x
    x = 675,349,282,442.66/685,136.70
  6. Step 6: Final answer
    x = 985,714.65

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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.