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Finding the Fourth Proportional to 869,630.92, 1,200,071.94 and 487,649.32

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Solution

The fourth proportional to 869,630.92, 1,200,071.94 and 487,649.32 is: 672,945.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,630.92 : 1,200,071.94 = 487,649.32 : x
  2. Step 2: Convert to fraction form
    869,630.92/1,200,071.94 = 487,649.32/x
  3. Step 3: Cross multiply
    869,630.92x = 1,200,071.94 × 487,649.32
  4. Step 4: Simplify right side
    869,630.92x = 585,214,265,492.08
  5. Step 5: Solve for x
    x = 585,214,265,492.08/869,630.92
  6. Step 6: Final answer
    x = 672,945.56

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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.