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Finding the Fourth Proportional to 644,803.45, 889,850.34 and 358,335.61

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Solution

The fourth proportional to 644,803.45, 889,850.34 and 358,335.61 is: 494,515.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,803.45 : 889,850.34 = 358,335.61 : x
  2. Step 2: Convert to fraction form
    644,803.45/889,850.34 = 358,335.61/x
  3. Step 3: Cross multiply
    644,803.45x = 889,850.34 × 358,335.61
  4. Step 4: Simplify right side
    644,803.45x = 318,865,064,392.61
  5. Step 5: Solve for x
    x = 318,865,064,392.61/644,803.45
  6. Step 6: Final answer
    x = 494,515.13

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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.