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Finding the Fourth Proportional to 713,505.03, 984,629.58 and 391,214.58

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Solution

The fourth proportional to 713,505.03, 984,629.58 and 391,214.58 is: 539,872.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,505.03 : 984,629.58 = 391,214.58 : x
  2. Step 2: Convert to fraction form
    713,505.03/984,629.58 = 391,214.58/x
  3. Step 3: Cross multiply
    713,505.03x = 984,629.58 × 391,214.58
  4. Step 4: Simplify right side
    713,505.03x = 385,201,447,595.28
  5. Step 5: Solve for x
    x = 385,201,447,595.28/713,505.03
  6. Step 6: Final answer
    x = 539,872.08

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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.