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Finding the Fourth Proportional to 642,642.12, 886,643.49 and 370,673.55

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Solution

The fourth proportional to 642,642.12, 886,643.49 and 370,673.55 is: 511,412.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,642.12 : 886,643.49 = 370,673.55 : x
  2. Step 2: Convert to fraction form
    642,642.12/886,643.49 = 370,673.55/x
  3. Step 3: Cross multiply
    642,642.12x = 886,643.49 × 370,673.55
  4. Step 4: Simplify right side
    642,642.12x = 328,655,290,022.69
  5. Step 5: Solve for x
    x = 328,655,290,022.69/642,642.12
  6. Step 6: Final answer
    x = 511,412.62

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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.