Home / 378,210.72-521,928-208,444.80

Finding the Fourth Proportional to 378,210.72, 521,928 and 208,444.80

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Solution

The fourth proportional to 378,210.72, 521,928 and 208,444.80 is: 287,652.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,210.72 : 521,928 = 208,444.80 : x
  2. Step 2: Convert to fraction form
    378,210.72/521,928 = 208,444.80/x
  3. Step 3: Cross multiply
    378,210.72x = 521,928 × 208,444.80
  4. Step 4: Simplify right side
    378,210.72x = 108,793,177,574.40
  5. Step 5: Solve for x
    x = 108,793,177,574.40/378,210.72
  6. Step 6: Final answer
    x = 287,652.28

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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.