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Finding the Fourth Proportional to 330,683.71, 493,779.67 and 321,715.66

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Solution

The fourth proportional to 330,683.71, 493,779.67 and 321,715.66 is: 480,388.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,683.71 : 493,779.67 = 321,715.66 : x
  2. Step 2: Convert to fraction form
    330,683.71/493,779.67 = 321,715.66/x
  3. Step 3: Cross multiply
    330,683.71x = 493,779.67 × 321,715.66
  4. Step 4: Simplify right side
    330,683.71x = 158,856,652,428.63
  5. Step 5: Solve for x
    x = 158,856,652,428.63/330,683.71
  6. Step 6: Final answer
    x = 480,388.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.