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Finding the Fourth Proportional to 644,369.92, 889,205.76 and 357,908.28

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Solution

The fourth proportional to 644,369.92, 889,205.76 and 357,908.28 is: 493,899.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,369.92 : 889,205.76 = 357,908.28 : x
  2. Step 2: Convert to fraction form
    644,369.92/889,205.76 = 357,908.28/x
  3. Step 3: Cross multiply
    644,369.92x = 889,205.76 × 357,908.28
  4. Step 4: Simplify right side
    644,369.92x = 318,254,104,127.69
  5. Step 5: Solve for x
    x = 318,254,104,127.69/644,369.92
  6. Step 6: Final answer
    x = 493,899.69

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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.