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Finding the Fourth Proportional to 995,331,320.80, 1,390,238,986.40 and 995,331,320.80

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Solution

The fourth proportional to 995,331,320.80, 1,390,238,986.40 and 995,331,320.80 is: 1,390,238,986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    995,331,320.80 : 1,390,238,986.40 = 995,331,320.80 : x
  2. Step 2: Convert to fraction form
    995,331,320.80/1,390,238,986.40 = 995,331,320.80/x
  3. Step 3: Cross multiply
    995,331,320.80x = 1,390,238,986.40 × 995,331,320.80
  4. Step 4: Simplify right side
    995,331,320.80x = 1,383,748,406,561,165,312
  5. Step 5: Solve for x
    x = 1,383,748,406,561,165,312/995,331,320.80
  6. Step 6: Final answer
    x = 1,390,238,986.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.