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Finding the Fourth Proportional to 873,000.60, 1,309,889.70 and 399,442.20

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Solution

The fourth proportional to 873,000.60, 1,309,889.70 and 399,442.20 is: 599,341.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,000.60 : 1,309,889.70 = 399,442.20 : x
  2. Step 2: Convert to fraction form
    873,000.60/1,309,889.70 = 399,442.20/x
  3. Step 3: Cross multiply
    873,000.60x = 1,309,889.70 × 399,442.20
  4. Step 4: Simplify right side
    873,000.60x = 523,225,223,525.34
  5. Step 5: Solve for x
    x = 523,225,223,525.34/873,000.60
  6. Step 6: Final answer
    x = 599,341.20

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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.