Home / 390,816.75-539,327.13-221,047.23

Finding the Fourth Proportional to 390,816.75, 539,327.13 and 221,047.23

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Solution

The fourth proportional to 390,816.75, 539,327.13 and 221,047.23 is: 305,045.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,816.75 : 539,327.13 = 221,047.23 : x
  2. Step 2: Convert to fraction form
    390,816.75/539,327.13 = 221,047.23/x
  3. Step 3: Cross multiply
    390,816.75x = 539,327.13 × 221,047.23
  4. Step 4: Simplify right side
    390,816.75x = 119,216,768,150.35
  5. Step 5: Solve for x
    x = 119,216,768,150.35/390,816.75
  6. Step 6: Final answer
    x = 305,045.19

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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.