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Finding the Fourth Proportional to 644,510.61, 889,394.46 and 358,048.17

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Solution

The fourth proportional to 644,510.61, 889,394.46 and 358,048.17 is: 494,089.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,510.61 : 889,394.46 = 358,048.17 : x
  2. Step 2: Convert to fraction form
    644,510.61/889,394.46 = 358,048.17/x
  3. Step 3: Cross multiply
    644,510.61x = 889,394.46 × 358,048.17
  4. Step 4: Simplify right side
    644,510.61x = 318,446,058,811.14
  5. Step 5: Solve for x
    x = 318,446,058,811.14/644,510.61
  6. Step 6: Final answer
    x = 494,089.71

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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.