Home / 685,746.90-1,029,203.55-307,250.10

Finding the Fourth Proportional to 685,746.90, 1,029,203.55 and 307,250.10

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Solution

The fourth proportional to 685,746.90, 1,029,203.55 and 307,250.10 is: 461,136.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,746.90 : 1,029,203.55 = 307,250.10 : x
  2. Step 2: Convert to fraction form
    685,746.90/1,029,203.55 = 307,250.10/x
  3. Step 3: Cross multiply
    685,746.90x = 1,029,203.55 × 307,250.10
  4. Step 4: Simplify right side
    685,746.90x = 316,222,893,657.86
  5. Step 5: Solve for x
    x = 316,222,893,657.86/685,746.90
  6. Step 6: Final answer
    x = 461,136.45

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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.