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Finding the Fourth Proportional to 660,565.33, 911,581.92 and 388,643.47

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Solution

The fourth proportional to 660,565.33, 911,581.92 and 388,643.47 is: 536,329.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,565.33 : 911,581.92 = 388,643.47 : x
  2. Step 2: Convert to fraction form
    660,565.33/911,581.92 = 388,643.47/x
  3. Step 3: Cross multiply
    660,565.33x = 911,581.92 × 388,643.47
  4. Step 4: Simplify right side
    660,565.33x = 354,280,360,578.06
  5. Step 5: Solve for x
    x = 354,280,360,578.06/660,565.33
  6. Step 6: Final answer
    x = 536,329.03

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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.