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Finding the Fourth Proportional to 847,768.80, 1,169,866.80 and 485,191.20

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Solution

The fourth proportional to 847,768.80, 1,169,866.80 and 485,191.20 is: 669,532.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    847,768.80 : 1,169,866.80 = 485,191.20 : x
  2. Step 2: Convert to fraction form
    847,768.80/1,169,866.80 = 485,191.20/x
  3. Step 3: Cross multiply
    847,768.80x = 1,169,866.80 × 485,191.20
  4. Step 4: Simplify right side
    847,768.80x = 567,609,076,532.16
  5. Step 5: Solve for x
    x = 567,609,076,532.16/847,768.80
  6. Step 6: Final answer
    x = 669,532.87

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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.