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Finding the Fourth Proportional to 680,496, 939,084.48 and 378,690.24

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Solution

The fourth proportional to 680,496, 939,084.48 and 378,690.24 is: 522,592.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,496 : 939,084.48 = 378,690.24 : x
  2. Step 2: Convert to fraction form
    680,496/939,084.48 = 378,690.24/x
  3. Step 3: Cross multiply
    680,496x = 939,084.48 × 378,690.24
  4. Step 4: Simplify right side
    680,496x = 355,622,127,111.48
  5. Step 5: Solve for x
    x = 355,622,127,111.48/680,496
  6. Step 6: Final answer
    x = 522,592.53

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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.