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Finding the Fourth Proportional to 312,635.01, 431,430.63 and 176,666.01

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Solution

The fourth proportional to 312,635.01, 431,430.63 and 176,666.01 is: 243,795.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,635.01 : 431,430.63 = 176,666.01 : x
  2. Step 2: Convert to fraction form
    312,635.01/431,430.63 = 176,666.01/x
  3. Step 3: Cross multiply
    312,635.01x = 431,430.63 × 176,666.01
  4. Step 4: Simplify right side
    312,635.01x = 76,219,127,993.89
  5. Step 5: Solve for x
    x = 76,219,127,993.89/312,635.01
  6. Step 6: Final answer
    x = 243,795.88

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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.