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Finding the Fourth Proportional to 328,590.92, 492,674.42 and 128,931.48

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Solution

The fourth proportional to 328,590.92, 492,674.42 and 128,931.48 is: 193,314.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,590.92 : 492,674.42 = 128,931.48 : x
  2. Step 2: Convert to fraction form
    328,590.92/492,674.42 = 128,931.48/x
  3. Step 3: Cross multiply
    328,590.92x = 492,674.42 × 128,931.48
  4. Step 4: Simplify right side
    328,590.92x = 63,521,242,451.07
  5. Step 5: Solve for x
    x = 63,521,242,451.07/328,590.92
  6. Step 6: Final answer
    x = 193,314.05

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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.