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Finding the Fourth Proportional to 282,661.02, 390,069.72 and 155,338.74

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Solution

The fourth proportional to 282,661.02, 390,069.72 and 155,338.74 is: 214,366.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,661.02 : 390,069.72 = 155,338.74 : x
  2. Step 2: Convert to fraction form
    282,661.02/390,069.72 = 155,338.74/x
  3. Step 3: Cross multiply
    282,661.02x = 390,069.72 × 155,338.74
  4. Step 4: Simplify right side
    282,661.02x = 60,592,938,816.95
  5. Step 5: Solve for x
    x = 60,592,938,816.95/282,661.02
  6. Step 6: Final answer
    x = 214,366.09

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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.