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Finding the Fourth Proportional to 553,811.40, 830,717.10 and 316,959.30

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Solution

The fourth proportional to 553,811.40, 830,717.10 and 316,959.30 is: 475,438.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,811.40 : 830,717.10 = 316,959.30 : x
  2. Step 2: Convert to fraction form
    553,811.40/830,717.10 = 316,959.30/x
  3. Step 3: Cross multiply
    553,811.40x = 830,717.10 × 316,959.30
  4. Step 4: Simplify right side
    553,811.40x = 263,303,510,514.03
  5. Step 5: Solve for x
    x = 263,303,510,514.03/553,811.40
  6. Step 6: Final answer
    x = 475,438.95

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.