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Finding the Fourth Proportional to 644,709.82, 889,683.39 and 358,230.64

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Solution

The fourth proportional to 644,709.82, 889,683.39 and 358,230.64 is: 494,349.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,709.82 : 889,683.39 = 358,230.64 : x
  2. Step 2: Convert to fraction form
    644,709.82/889,683.39 = 358,230.64/x
  3. Step 3: Cross multiply
    644,709.82x = 889,683.39 × 358,230.64
  4. Step 4: Simplify right side
    644,709.82x = 318,711,850,197.07
  5. Step 5: Solve for x
    x = 318,711,850,197.07/644,709.82
  6. Step 6: Final answer
    x = 494,349.30

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1.5x scale

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.