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Finding the Fourth Proportional to 690,014.16, 952,218 and 388,208.16

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Solution

The fourth proportional to 690,014.16, 952,218 and 388,208.16 is: 535,726.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,014.16 : 952,218 = 388,208.16 : x
  2. Step 2: Convert to fraction form
    690,014.16/952,218 = 388,208.16/x
  3. Step 3: Cross multiply
    690,014.16x = 952,218 × 388,208.16
  4. Step 4: Simplify right side
    690,014.16x = 369,658,797,698.88
  5. Step 5: Solve for x
    x = 369,658,797,698.88/690,014.16
  6. Step 6: Final answer
    x = 535,726.39

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Half scale
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Double scale
Find fourth proportional to 690,015.16, 952,219.38 and 388,209.16
Similar ratio
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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.