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Finding the Fourth Proportional to 328,706.13, 492,685.47 and 139,048.14

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Solution

The fourth proportional to 328,706.13, 492,685.47 and 139,048.14 is: 208,414.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,706.13 : 492,685.47 = 139,048.14 : x
  2. Step 2: Convert to fraction form
    328,706.13/492,685.47 = 139,048.14/x
  3. Step 3: Cross multiply
    328,706.13x = 492,685.47 × 139,048.14
  4. Step 4: Simplify right side
    328,706.13x = 68,506,998,208.53
  5. Step 5: Solve for x
    x = 68,506,998,208.53/328,706.13
  6. Step 6: Final answer
    x = 208,414.12

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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.