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Finding the Fourth Proportional to 644,436.64, 889,570.56 and 429,498.28

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Solution

The fourth proportional to 644,436.64, 889,570.56 and 429,498.28 is: 592,872.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,436.64 : 889,570.56 = 429,498.28 : x
  2. Step 2: Convert to fraction form
    644,436.64/889,570.56 = 429,498.28/x
  3. Step 3: Cross multiply
    644,436.64x = 889,570.56 × 429,498.28
  4. Step 4: Simplify right side
    644,436.64x = 382,069,025,458.64
  5. Step 5: Solve for x
    x = 382,069,025,458.64/644,436.64
  6. Step 6: Final answer
    x = 592,872.91

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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.