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Finding the Fourth Proportional to 660,248.16, 911,359.26 and 388,304.16

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Solution

The fourth proportional to 660,248.16, 911,359.26 and 388,304.16 is: 535,987.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,248.16 : 911,359.26 = 388,304.16 : x
  2. Step 2: Convert to fraction form
    660,248.16/911,359.26 = 388,304.16/x
  3. Step 3: Cross multiply
    660,248.16x = 911,359.26 × 388,304.16
  4. Step 4: Simplify right side
    660,248.16x = 353,884,591,912.52
  5. Step 5: Solve for x
    x = 353,884,591,912.52/660,248.16
  6. Step 6: Final answer
    x = 535,987.24

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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.