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Finding the Fourth Proportional to 680,482.88, 939,005.28 and 394,022.40

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Solution

The fourth proportional to 680,482.88, 939,005.28 and 394,022.40 is: 543,715.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,482.88 : 939,005.28 = 394,022.40 : x
  2. Step 2: Convert to fraction form
    680,482.88/939,005.28 = 394,022.40/x
  3. Step 3: Cross multiply
    680,482.88x = 939,005.28 × 394,022.40
  4. Step 4: Simplify right side
    680,482.88x = 369,989,114,038.27
  5. Step 5: Solve for x
    x = 369,989,114,038.27/680,482.88
  6. Step 6: Final answer
    x = 543,715.54

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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.