Home / 644,330.10-889,123.52-372,415.61

Finding the Fourth Proportional to 644,330.10, 889,123.52 and 372,415.61

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Solution

The fourth proportional to 644,330.10, 889,123.52 and 372,415.61 is: 513,903.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,330.10 : 889,123.52 = 372,415.61 : x
  2. Step 2: Convert to fraction form
    644,330.10/889,123.52 = 372,415.61/x
  3. Step 3: Cross multiply
    644,330.10x = 889,123.52 × 372,415.61
  4. Step 4: Simplify right side
    644,330.10x = 331,123,471,758.45
  5. Step 5: Solve for x
    x = 331,123,471,758.45/644,330.10
  6. Step 6: Final answer
    x = 513,903.47

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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.