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Finding the Fourth Proportional to 638,633.92, 881,320.80 and 352,164.28

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Solution

The fourth proportional to 638,633.92, 881,320.80 and 352,164.28 is: 485,990.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,633.92 : 881,320.80 = 352,164.28 : x
  2. Step 2: Convert to fraction form
    638,633.92/881,320.80 = 352,164.28/x
  3. Step 3: Cross multiply
    638,633.92x = 881,320.80 × 352,164.28
  4. Step 4: Simplify right side
    638,633.92x = 310,369,704,981.02
  5. Step 5: Solve for x
    x = 310,369,704,981.02/638,633.92
  6. Step 6: Final answer
    x = 485,990.01

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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.