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Finding the Fourth Proportional to 644,732.26, 889,359.95 and 402,594.50

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Solution

The fourth proportional to 644,732.26, 889,359.95 and 402,594.50 is: 555,349.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,732.26 : 889,359.95 = 402,594.50 : x
  2. Step 2: Convert to fraction form
    644,732.26/889,359.95 = 402,594.50/x
  3. Step 3: Cross multiply
    644,732.26x = 889,359.95 × 402,594.50
  4. Step 4: Simplify right side
    644,732.26x = 358,051,427,620.16
  5. Step 5: Solve for x
    x = 358,051,427,620.16/644,732.26
  6. Step 6: Final answer
    x = 555,349.02

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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.