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Finding the Fourth Proportional to 392,690.70, 589,036.05 and 366,252.30

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Solution

The fourth proportional to 392,690.70, 589,036.05 and 366,252.30 is: 549,378.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,690.70 : 589,036.05 = 366,252.30 : x
  2. Step 2: Convert to fraction form
    392,690.70/589,036.05 = 366,252.30/x
  3. Step 3: Cross multiply
    392,690.70x = 589,036.05 × 366,252.30
  4. Step 4: Simplify right side
    392,690.70x = 215,735,808,095.42
  5. Step 5: Solve for x
    x = 215,735,808,095.42/392,690.70
  6. Step 6: Final answer
    x = 549,378.45

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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.