Home / 280,815.08-387,525-153,490.68

Finding the Fourth Proportional to 280,815.08, 387,525 and 153,490.68

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Solution

The fourth proportional to 280,815.08, 387,525 and 153,490.68 is: 211,817.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,815.08 : 387,525 = 153,490.68 : x
  2. Step 2: Convert to fraction form
    280,815.08/387,525 = 153,490.68/x
  3. Step 3: Cross multiply
    280,815.08x = 387,525 × 153,490.68
  4. Step 4: Simplify right side
    280,815.08x = 59,481,475,767
  5. Step 5: Solve for x
    x = 59,481,475,767/280,815.08
  6. Step 6: Final answer
    x = 211,817.25

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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.