Home / 644,915.61-889,977.12-358,429.55

Finding the Fourth Proportional to 644,915.61, 889,977.12 and 358,429.55

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Solution

The fourth proportional to 644,915.61, 889,977.12 and 358,429.55 is: 494,629.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,915.61 : 889,977.12 = 358,429.55 : x
  2. Step 2: Convert to fraction form
    644,915.61/889,977.12 = 358,429.55/x
  3. Step 3: Cross multiply
    644,915.61x = 889,977.12 × 358,429.55
  4. Step 4: Simplify right side
    644,915.61x = 318,994,094,182.01
  5. Step 5: Solve for x
    x = 318,994,094,182.01/644,915.61
  6. Step 6: Final answer
    x = 494,629.20

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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.