Home / 721,371.15-995,405.63-415,547.55

Finding the Fourth Proportional to 721,371.15, 995,405.63 and 415,547.55

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Solution

The fourth proportional to 721,371.15, 995,405.63 and 415,547.55 is: 573,405.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,371.15 : 995,405.63 = 415,547.55 : x
  2. Step 2: Convert to fraction form
    721,371.15/995,405.63 = 415,547.55/x
  3. Step 3: Cross multiply
    721,371.15x = 995,405.63 × 415,547.55
  4. Step 4: Simplify right side
    721,371.15x = 413,638,368,724.97
  5. Step 5: Solve for x
    x = 413,638,368,724.97/721,371.15
  6. Step 6: Final answer
    x = 573,405.75

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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.