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Finding the Fourth Proportional to 644,296.40, 889,573.84 and 402,687.60

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Solution

The fourth proportional to 644,296.40, 889,573.84 and 402,687.60 is: 555,986.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,296.40 : 889,573.84 = 402,687.60 : x
  2. Step 2: Convert to fraction form
    644,296.40/889,573.84 = 402,687.60/x
  3. Step 3: Cross multiply
    644,296.40x = 889,573.84 × 402,687.60
  4. Step 4: Simplify right side
    644,296.40x = 358,220,354,652.38
  5. Step 5: Solve for x
    x = 358,220,354,652.38/644,296.40
  6. Step 6: Final answer
    x = 555,986.89

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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.