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Finding the Fourth Proportional to 713,690.01, 984,905.64 and 391,380.84

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Solution

The fourth proportional to 713,690.01, 984,905.64 and 391,380.84 is: 540,112.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,690.01 : 984,905.64 = 391,380.84 : x
  2. Step 2: Convert to fraction form
    713,690.01/984,905.64 = 391,380.84/x
  3. Step 3: Cross multiply
    713,690.01x = 984,905.64 × 391,380.84
  4. Step 4: Simplify right side
    713,690.01x = 385,473,196,703.94
  5. Step 5: Solve for x
    x = 385,473,196,703.94/713,690.01
  6. Step 6: Final answer
    x = 540,112.92

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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.