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Finding the Fourth Proportional to 721,242.80, 995,302.77 and 398,952.63

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Solution

The fourth proportional to 721,242.80, 995,302.77 and 398,952.63 is: 550,547.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,242.80 : 995,302.77 = 398,952.63 : x
  2. Step 2: Convert to fraction form
    721,242.80/995,302.77 = 398,952.63/x
  3. Step 3: Cross multiply
    721,242.80x = 995,302.77 × 398,952.63
  4. Step 4: Simplify right side
    721,242.80x = 397,078,657,737.79
  5. Step 5: Solve for x
    x = 397,078,657,737.79/721,242.80
  6. Step 6: Final answer
    x = 550,547.83

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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.