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Finding the Fourth Proportional to 713,697.02, 984,915.30 and 391,387.84

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Solution

The fourth proportional to 713,697.02, 984,915.30 and 391,387.84 is: 540,122.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,697.02 : 984,915.30 = 391,387.84 : x
  2. Step 2: Convert to fraction form
    713,697.02/984,915.30 = 391,387.84/x
  3. Step 3: Cross multiply
    713,697.02x = 984,915.30 × 391,387.84
  4. Step 4: Simplify right side
    713,697.02x = 385,483,871,849.95
  5. Step 5: Solve for x
    x = 385,483,871,849.95/713,697.02
  6. Step 6: Final answer
    x = 540,122.57

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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.