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Finding the Fourth Proportional to 644,352.89, 889,206.96 and 357,899.63

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Solution

The fourth proportional to 644,352.89, 889,206.96 and 357,899.63 is: 493,901.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,352.89 : 889,206.96 = 357,899.63 : x
  2. Step 2: Convert to fraction form
    644,352.89/889,206.96 = 357,899.63/x
  3. Step 3: Cross multiply
    644,352.89x = 889,206.96 × 357,899.63
  4. Step 4: Simplify right side
    644,352.89x = 318,246,841,977.43
  5. Step 5: Solve for x
    x = 318,246,841,977.43/644,352.89
  6. Step 6: Final answer
    x = 493,901.47

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Double scale
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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.