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Finding the Fourth Proportional to 279,503.81, 385,706.83 and 155,324.36

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Solution

The fourth proportional to 279,503.81, 385,706.83 and 155,324.36 is: 214,342.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,503.81 : 385,706.83 = 155,324.36 : x
  2. Step 2: Convert to fraction form
    279,503.81/385,706.83 = 155,324.36/x
  3. Step 3: Cross multiply
    279,503.81x = 385,706.83 × 155,324.36
  4. Step 4: Simplify right side
    279,503.81x = 59,909,665,740.76
  5. Step 5: Solve for x
    x = 59,909,665,740.76/279,503.81
  6. Step 6: Final answer
    x = 214,342.93

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1.5x scale

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.