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Finding the Fourth Proportional to 847,807.28, 1,169,970.72 and 485,229.68

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Solution

The fourth proportional to 847,807.28, 1,169,970.72 and 485,229.68 is: 669,615.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    847,807.28 : 1,169,970.72 = 485,229.68 : x
  2. Step 2: Convert to fraction form
    847,807.28/1,169,970.72 = 485,229.68/x
  3. Step 3: Cross multiply
    847,807.28x = 1,169,970.72 × 485,229.68
  4. Step 4: Simplify right side
    847,807.28x = 567,704,518,074.97
  5. Step 5: Solve for x
    x = 567,704,518,074.97/847,807.28
  6. Step 6: Final answer
    x = 669,615.05

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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.