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Finding the Fourth Proportional to 644,071.40, 888,777.34 and 357,591.40

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Solution

The fourth proportional to 644,071.40, 888,777.34 and 357,591.40 is: 493,453.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,071.40 : 888,777.34 = 357,591.40 : x
  2. Step 2: Convert to fraction form
    644,071.40/888,777.34 = 357,591.40/x
  3. Step 3: Cross multiply
    644,071.40x = 888,777.34 × 357,591.40
  4. Step 4: Simplify right side
    644,071.40x = 317,819,133,298.88
  5. Step 5: Solve for x
    x = 317,819,133,298.88/644,071.40
  6. Step 6: Final answer
    x = 493,453.26

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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.