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Finding the Fourth Proportional to 291,405.90, 402,172.11 and 183,970.38

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Solution

The fourth proportional to 291,405.90, 402,172.11 and 183,970.38 is: 253,899.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,405.90 : 402,172.11 = 183,970.38 : x
  2. Step 2: Convert to fraction form
    291,405.90/402,172.11 = 183,970.38/x
  3. Step 3: Cross multiply
    291,405.90x = 402,172.11 × 183,970.38
  4. Step 4: Simplify right side
    291,405.90x = 73,987,755,902.10
  5. Step 5: Solve for x
    x = 73,987,755,902.10/291,405.90
  6. Step 6: Final answer
    x = 253,899.31

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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.