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Finding the Fourth Proportional to 713,196.56, 984,209.23 and 390,905.66

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Solution

The fourth proportional to 713,196.56, 984,209.23 and 390,905.66 is: 539,448.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,196.56 : 984,209.23 = 390,905.66 : x
  2. Step 2: Convert to fraction form
    713,196.56/984,209.23 = 390,905.66/x
  3. Step 3: Cross multiply
    713,196.56x = 984,209.23 × 390,905.66
  4. Step 4: Simplify right side
    713,196.56x = 384,732,960,114.50
  5. Step 5: Solve for x
    x = 384,732,960,114.50/713,196.56
  6. Step 6: Final answer
    x = 539,448.70

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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.