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Finding the Fourth Proportional to 328,457.52, 492,686.28 and 79,139.52

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Solution

The fourth proportional to 328,457.52, 492,686.28 and 79,139.52 is: 118,709.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,457.52 : 492,686.28 = 79,139.52 : x
  2. Step 2: Convert to fraction form
    328,457.52/492,686.28 = 79,139.52/x
  3. Step 3: Cross multiply
    328,457.52x = 492,686.28 × 79,139.52
  4. Step 4: Simplify right side
    328,457.52x = 38,990,955,709.79
  5. Step 5: Solve for x
    x = 38,990,955,709.79/328,457.52
  6. Step 6: Final answer
    x = 118,709.28

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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.