Home / 390,942.64-539,551.56-218,926.12

Finding the Fourth Proportional to 390,942.64, 539,551.56 and 218,926.12

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Solution

The fourth proportional to 390,942.64, 539,551.56 and 218,926.12 is: 302,146.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,942.64 : 539,551.56 = 218,926.12 : x
  2. Step 2: Convert to fraction form
    390,942.64/539,551.56 = 218,926.12/x
  3. Step 3: Cross multiply
    390,942.64x = 539,551.56 × 218,926.12
  4. Step 4: Simplify right side
    390,942.64x = 118,121,929,570.75
  5. Step 5: Solve for x
    x = 118,121,929,570.75/390,942.64
  6. Step 6: Final answer
    x = 302,146.45

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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.