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Finding the Fourth Proportional to 721,083.48, 995,220.06 and 434,603.90

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Solution

The fourth proportional to 721,083.48, 995,220.06 and 434,603.90 is: 599,828.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,083.48 : 995,220.06 = 434,603.90 : x
  2. Step 2: Convert to fraction form
    721,083.48/995,220.06 = 434,603.90/x
  3. Step 3: Cross multiply
    721,083.48x = 995,220.06 × 434,603.90
  4. Step 4: Simplify right side
    721,083.48x = 432,526,514,458.13
  5. Step 5: Solve for x
    x = 432,526,514,458.13/721,083.48
  6. Step 6: Final answer
    x = 599,828.63

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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.