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Finding the Fourth Proportional to 644,777.15, 889,751.66 and 358,280.15

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Solution

The fourth proportional to 644,777.15, 889,751.66 and 358,280.15 is: 494,403.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,777.15 : 889,751.66 = 358,280.15 : x
  2. Step 2: Convert to fraction form
    644,777.15/889,751.66 = 358,280.15/x
  3. Step 3: Cross multiply
    644,777.15x = 889,751.66 × 358,280.15
  4. Step 4: Simplify right side
    644,777.15x = 318,780,351,967.39
  5. Step 5: Solve for x
    x = 318,780,351,967.39/644,777.15
  6. Step 6: Final answer
    x = 494,403.93

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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.