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Finding the Fourth Proportional to 290,602.80, 400,981.32 and 163,283.76

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Solution

The fourth proportional to 290,602.80, 400,981.32 and 163,283.76 is: 225,303.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,602.80 : 400,981.32 = 163,283.76 : x
  2. Step 2: Convert to fraction form
    290,602.80/400,981.32 = 163,283.76/x
  3. Step 3: Cross multiply
    290,602.80x = 400,981.32 × 163,283.76
  4. Step 4: Simplify right side
    290,602.80x = 65,473,737,619.36
  5. Step 5: Solve for x
    x = 65,473,737,619.36/290,602.80
  6. Step 6: Final answer
    x = 225,303.19

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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.