Home / 390,923.68-539,525.56-218,907.15

Finding the Fourth Proportional to 390,923.68, 539,525.56 and 218,907.15

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Solution

The fourth proportional to 390,923.68, 539,525.56 and 218,907.15 is: 302,120.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,923.68 : 539,525.56 = 218,907.15 : x
  2. Step 2: Convert to fraction form
    390,923.68/539,525.56 = 218,907.15/x
  3. Step 3: Cross multiply
    390,923.68x = 539,525.56 × 218,907.15
  4. Step 4: Simplify right side
    390,923.68x = 118,106,002,691.75
  5. Step 5: Solve for x
    x = 118,106,002,691.75/390,923.68
  6. Step 6: Final answer
    x = 302,120.36

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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.