Home / 285,479.40-393,964.74-158,157

Finding the Fourth Proportional to 285,479.40, 393,964.74 and 158,157

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Solution

The fourth proportional to 285,479.40, 393,964.74 and 158,157 is: 218,258.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,479.40 : 393,964.74 = 158,157 : x
  2. Step 2: Convert to fraction form
    285,479.40/393,964.74 = 158,157/x
  3. Step 3: Cross multiply
    285,479.40x = 393,964.74 × 158,157
  4. Step 4: Simplify right side
    285,479.40x = 62,308,281,384.18
  5. Step 5: Solve for x
    x = 62,308,281,384.18/285,479.40
  6. Step 6: Final answer
    x = 218,258.42

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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.