Home / 393,143.28-542,582.88-218,730.84

Finding the Fourth Proportional to 393,143.28, 542,582.88 and 218,730.84

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Solution

The fourth proportional to 393,143.28, 542,582.88 and 218,730.84 is: 301,873.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,143.28 : 542,582.88 = 218,730.84 : x
  2. Step 2: Convert to fraction form
    393,143.28/542,582.88 = 218,730.84/x
  3. Step 3: Cross multiply
    393,143.28x = 542,582.88 × 218,730.84
  4. Step 4: Simplify right side
    393,143.28x = 118,679,609,112.02
  5. Step 5: Solve for x
    x = 118,679,609,112.02/393,143.28
  6. Step 6: Final answer
    x = 301,873.68

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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.