Home / 385,119.08-531,448.75-210,686.47

Finding the Fourth Proportional to 385,119.08, 531,448.75 and 210,686.47

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Solution

The fourth proportional to 385,119.08, 531,448.75 and 210,686.47 is: 290,738.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,119.08 : 531,448.75 = 210,686.47 : x
  2. Step 2: Convert to fraction form
    385,119.08/531,448.75 = 210,686.47/x
  3. Step 3: Cross multiply
    385,119.08x = 531,448.75 × 210,686.47
  4. Step 4: Simplify right side
    385,119.08x = 111,969,058,873.04
  5. Step 5: Solve for x
    x = 111,969,058,873.04/385,119.08
  6. Step 6: Final answer
    x = 290,738.80

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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.