Home / 280,533.69-387,137.91-153,209.28

Finding the Fourth Proportional to 280,533.69, 387,137.91 and 153,209.28

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Solution

The fourth proportional to 280,533.69, 387,137.91 and 153,209.28 is: 211,429.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,533.69 : 387,137.91 = 153,209.28 : x
  2. Step 2: Convert to fraction form
    280,533.69/387,137.91 = 153,209.28/x
  3. Step 3: Cross multiply
    280,533.69x = 387,137.91 × 153,209.28
  4. Step 4: Simplify right side
    280,533.69x = 59,313,122,478.11
  5. Step 5: Solve for x
    x = 59,313,122,478.11/280,533.69
  6. Step 6: Final answer
    x = 211,429.59

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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.