Home / 280,764.09-387,454.65-153,439.68

Finding the Fourth Proportional to 280,764.09, 387,454.65 and 153,439.68

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Solution

The fourth proportional to 280,764.09, 387,454.65 and 153,439.68 is: 211,746.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,764.09 : 387,454.65 = 153,439.68 : x
  2. Step 2: Convert to fraction form
    280,764.09/387,454.65 = 153,439.68/x
  3. Step 3: Cross multiply
    280,764.09x = 387,454.65 × 153,439.68
  4. Step 4: Simplify right side
    280,764.09x = 59,450,917,510.51
  5. Step 5: Solve for x
    x = 59,450,917,510.51/280,764.09
  6. Step 6: Final answer
    x = 211,746.87

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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.