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Finding the Fourth Proportional to 282,904.92, 390,400.99 and 155,580.51

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Solution

The fourth proportional to 282,904.92, 390,400.99 and 155,580.51 is: 214,696.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,904.92 : 390,400.99 = 155,580.51 : x
  2. Step 2: Convert to fraction form
    282,904.92/390,400.99 = 155,580.51/x
  3. Step 3: Cross multiply
    282,904.92x = 390,400.99 × 155,580.51
  4. Step 4: Simplify right side
    282,904.92x = 60,738,785,128.70
  5. Step 5: Solve for x
    x = 60,738,785,128.70/282,904.92
  6. Step 6: Final answer
    x = 214,696.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.