Home / 280,448.30-387,014.28-153,121.16

Finding the Fourth Proportional to 280,448.30, 387,014.28 and 153,121.16

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Solution

The fourth proportional to 280,448.30, 387,014.28 and 153,121.16 is: 211,304.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,448.30 : 387,014.28 = 153,121.16 : x
  2. Step 2: Convert to fraction form
    280,448.30/387,014.28 = 153,121.16/x
  3. Step 3: Cross multiply
    280,448.30x = 387,014.28 × 153,121.16
  4. Step 4: Simplify right side
    280,448.30x = 59,260,075,490.16
  5. Step 5: Solve for x
    x = 59,260,075,490.16/280,448.30
  6. Step 6: Final answer
    x = 211,304.81

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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.