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Finding the Fourth Proportional to 328,454.46, 492,681.69 and 79,136.46

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Solution

The fourth proportional to 328,454.46, 492,681.69 and 79,136.46 is: 118,704.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,454.46 : 492,681.69 = 79,136.46 : x
  2. Step 2: Convert to fraction form
    328,454.46/492,681.69 = 79,136.46/x
  3. Step 3: Cross multiply
    328,454.46x = 492,681.69 × 79,136.46
  4. Step 4: Simplify right side
    328,454.46x = 38,989,084,853.42
  5. Step 5: Solve for x
    x = 38,989,084,853.42/328,454.46
  6. Step 6: Final answer
    x = 118,704.69

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1.5x scale

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.