Home / 291,985.10-438,123.45-165,722.30

Finding the Fourth Proportional to 291,985.10, 438,123.45 and 165,722.30

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Solution

The fourth proportional to 291,985.10, 438,123.45 and 165,722.30 is: 248,666.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,985.10 : 438,123.45 = 165,722.30 : x
  2. Step 2: Convert to fraction form
    291,985.10/438,123.45 = 165,722.30/x
  3. Step 3: Cross multiply
    291,985.10x = 438,123.45 × 165,722.30
  4. Step 4: Simplify right side
    291,985.10x = 72,606,825,817.94
  5. Step 5: Solve for x
    x = 72,606,825,817.94/291,985.10
  6. Step 6: Final answer
    x = 248,666.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.