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Finding the Fourth Proportional to 354,699.14, 489,683.68 and 245,961.50

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Solution

The fourth proportional to 354,699.14, 489,683.68 and 245,961.50 is: 339,564.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,699.14 : 489,683.68 = 245,961.50 : x
  2. Step 2: Convert to fraction form
    354,699.14/489,683.68 = 245,961.50/x
  3. Step 3: Cross multiply
    354,699.14x = 489,683.68 × 245,961.50
  4. Step 4: Simplify right side
    354,699.14x = 120,443,329,395.00
  5. Step 5: Solve for x
    x = 120,443,329,395.00/354,699.14
  6. Step 6: Final answer
    x = 339,564.77

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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.