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Finding the Fourth Proportional to 644,732.42, 889,739.61 and 358,247.30

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Solution

The fourth proportional to 644,732.42, 889,739.61 and 358,247.30 is: 494,386.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,732.42 : 889,739.61 = 358,247.30 : x
  2. Step 2: Convert to fraction form
    644,732.42/889,739.61 = 358,247.30/x
  3. Step 3: Cross multiply
    644,732.42x = 889,739.61 × 358,247.30
  4. Step 4: Simplify right side
    644,732.42x = 318,746,812,985.55
  5. Step 5: Solve for x
    x = 318,746,812,985.55/644,732.42
  6. Step 6: Final answer
    x = 494,386.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.