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Finding the Fourth Proportional to 328,538.15, 492,811.13 and 128,952.53

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Solution

The fourth proportional to 328,538.15, 492,811.13 and 128,952.53 is: 193,430.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,538.15 : 492,811.13 = 128,952.53 : x
  2. Step 2: Convert to fraction form
    328,538.15/492,811.13 = 128,952.53/x
  3. Step 3: Cross multiply
    328,538.15x = 492,811.13 × 128,952.53
  4. Step 4: Simplify right side
    328,538.15x = 63,549,239,883.98
  5. Step 5: Solve for x
    x = 63,549,239,883.98/328,538.15
  6. Step 6: Final answer
    x = 193,430.32

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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.