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Finding the Fourth Proportional to 689,892.13, 952,065.72 and 388,086.13

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Solution

The fourth proportional to 689,892.13, 952,065.72 and 388,086.13 is: 535,567.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,892.13 : 952,065.72 = 388,086.13 : x
  2. Step 2: Convert to fraction form
    689,892.13/952,065.72 = 388,086.13/x
  3. Step 3: Cross multiply
    689,892.13x = 952,065.72 × 388,086.13
  4. Step 4: Simplify right side
    689,892.13x = 369,483,494,079.70
  5. Step 5: Solve for x
    x = 369,483,494,079.70/689,892.13
  6. Step 6: Final answer
    x = 535,567.06

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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.