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Finding the Fourth Proportional to 991,636.80, 1,392,024 and 991,636.80

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Solution

The fourth proportional to 991,636.80, 1,392,024 and 991,636.80 is: 1,392,024

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,636.80 : 1,392,024 = 991,636.80 : x
  2. Step 2: Convert to fraction form
    991,636.80/1,392,024 = 991,636.80/x
  3. Step 3: Cross multiply
    991,636.80x = 1,392,024 × 991,636.80
  4. Step 4: Simplify right side
    991,636.80x = 1,380,382,224,883.20
  5. Step 5: Solve for x
    x = 1,380,382,224,883.20/991,636.80
  6. Step 6: Final answer
    x = 1,392,024

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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.