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Finding the Fourth Proportional to 282,690.50, 390,108.50 and 155,363.36

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Solution

The fourth proportional to 282,690.50, 390,108.50 and 155,363.36 is: 214,399.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,690.50 : 390,108.50 = 155,363.36 : x
  2. Step 2: Convert to fraction form
    282,690.50/390,108.50 = 155,363.36/x
  3. Step 3: Cross multiply
    282,690.50x = 390,108.50 × 155,363.36
  4. Step 4: Simplify right side
    282,690.50x = 60,608,564,597.20
  5. Step 5: Solve for x
    x = 60,608,564,597.20/282,690.50
  6. Step 6: Final answer
    x = 214,399.02

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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.