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Finding the Fourth Proportional to 644,212.80, 889,036.56 and 357,737.76

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Solution

The fourth proportional to 644,212.80, 889,036.56 and 357,737.76 is: 493,690.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,212.80 : 889,036.56 = 357,737.76 : x
  2. Step 2: Convert to fraction form
    644,212.80/889,036.56 = 357,737.76/x
  3. Step 3: Cross multiply
    644,212.80x = 889,036.56 × 357,737.76
  4. Step 4: Simplify right side
    644,212.80x = 318,041,947,532.51
  5. Step 5: Solve for x
    x = 318,041,947,532.51/644,212.80
  6. Step 6: Final answer
    x = 493,690.82

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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.