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Finding the Fourth Proportional to 644,776.28, 889,791.72 and 358,323.08

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Solution

The fourth proportional to 644,776.28, 889,791.72 and 358,323.08 is: 494,486.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,776.28 : 889,791.72 = 358,323.08 : x
  2. Step 2: Convert to fraction form
    644,776.28/889,791.72 = 358,323.08/x
  3. Step 3: Cross multiply
    644,776.28x = 889,791.72 × 358,323.08
  4. Step 4: Simplify right side
    644,776.28x = 318,832,909,668.90
  5. Step 5: Solve for x
    x = 318,832,909,668.90/644,776.28
  6. Step 6: Final answer
    x = 494,486.10

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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.