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Finding the Fourth Proportional to 380,559.87, 525,150.09 and 208,443.51

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Solution

The fourth proportional to 380,559.87, 525,150.09 and 208,443.51 is: 287,639.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,559.87 : 525,150.09 = 208,443.51 : x
  2. Step 2: Convert to fraction form
    380,559.87/525,150.09 = 208,443.51/x
  3. Step 3: Cross multiply
    380,559.87x = 525,150.09 × 208,443.51
  4. Step 4: Simplify right side
    380,559.87x = 109,464,128,036.42
  5. Step 5: Solve for x
    x = 109,464,128,036.42/380,559.87
  6. Step 6: Final answer
    x = 287,639.70

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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.