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Finding the Fourth Proportional to 630,069.40, 944,499.30 and 209,128.60

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Solution

The fourth proportional to 630,069.40, 944,499.30 and 209,128.60 is: 313,492.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,069.40 : 944,499.30 = 209,128.60 : x
  2. Step 2: Convert to fraction form
    630,069.40/944,499.30 = 209,128.60/x
  3. Step 3: Cross multiply
    630,069.40x = 944,499.30 × 209,128.60
  4. Step 4: Simplify right side
    630,069.40x = 197,521,816,309.98
  5. Step 5: Solve for x
    x = 197,521,816,309.98/630,069.40
  6. Step 6: Final answer
    x = 313,492.16

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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.