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Finding the Fourth Proportional to 380,661.68, 525,319.84 and 208,568.40

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Solution

The fourth proportional to 380,661.68, 525,319.84 and 208,568.40 is: 287,828.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,661.68 : 525,319.84 = 208,568.40 : x
  2. Step 2: Convert to fraction form
    380,661.68/525,319.84 = 208,568.40/x
  3. Step 3: Cross multiply
    380,661.68x = 525,319.84 × 208,568.40
  4. Step 4: Simplify right side
    380,661.68x = 109,565,118,517.06
  5. Step 5: Solve for x
    x = 109,565,118,517.06/380,661.68
  6. Step 6: Final answer
    x = 287,828.07

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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.