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Finding the Fourth Proportional to 638,602.80, 881,226.78 and 352,116.78

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Solution

The fourth proportional to 638,602.80, 881,226.78 and 352,116.78 is: 485,896.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,602.80 : 881,226.78 = 352,116.78 : x
  2. Step 2: Convert to fraction form
    638,602.80/881,226.78 = 352,116.78/x
  3. Step 3: Cross multiply
    638,602.80x = 881,226.78 × 352,116.78
  4. Step 4: Simplify right side
    638,602.80x = 310,294,736,223.37
  5. Step 5: Solve for x
    x = 310,294,736,223.37/638,602.80
  6. Step 6: Final answer
    x = 485,896.30

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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.