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Finding the Fourth Proportional to 401,672, 554,312.81 and 220,380.63

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Solution

The fourth proportional to 401,672, 554,312.81 and 220,380.63 is: 304,128.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,672 : 554,312.81 = 220,380.63 : x
  2. Step 2: Convert to fraction form
    401,672/554,312.81 = 220,380.63/x
  3. Step 3: Cross multiply
    401,672x = 554,312.81 × 220,380.63
  4. Step 4: Simplify right side
    401,672x = 122,159,806,284.87
  5. Step 5: Solve for x
    x = 122,159,806,284.87/401,672
  6. Step 6: Final answer
    x = 304,128.26

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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.