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Finding the Fourth Proportional to 690,637.89, 952,860.99 and 388,773.57

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Solution

The fourth proportional to 690,637.89, 952,860.99 and 388,773.57 is: 536,384.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,637.89 : 952,860.99 = 388,773.57 : x
  2. Step 2: Convert to fraction form
    690,637.89/952,860.99 = 388,773.57/x
  3. Step 3: Cross multiply
    690,637.89x = 952,860.99 × 388,773.57
  4. Step 4: Simplify right side
    690,637.89x = 370,447,168,796.03
  5. Step 5: Solve for x
    x = 370,447,168,796.03/690,637.89
  6. Step 6: Final answer
    x = 536,384.08

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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.