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Finding the Fourth Proportional to 713,720.22, 984,946.50 and 391,427.49

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Solution

The fourth proportional to 713,720.22, 984,946.50 and 391,427.49 is: 540,176.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,720.22 : 984,946.50 = 391,427.49 : x
  2. Step 2: Convert to fraction form
    713,720.22/984,946.50 = 391,427.49/x
  3. Step 3: Cross multiply
    713,720.22x = 984,946.50 × 391,427.49
  4. Step 4: Simplify right side
    713,720.22x = 385,535,136,279.29
  5. Step 5: Solve for x
    x = 385,535,136,279.29/713,720.22
  6. Step 6: Final answer
    x = 540,176.84

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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.