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Finding the Fourth Proportional to 644,851.91, 889,619.59 and 402,714.11

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Solution

The fourth proportional to 644,851.91, 889,619.59 and 402,714.11 is: 555,573.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,851.91 : 889,619.59 = 402,714.11 : x
  2. Step 2: Convert to fraction form
    644,851.91/889,619.59 = 402,714.11/x
  3. Step 3: Cross multiply
    644,851.91x = 889,619.59 × 402,714.11
  4. Step 4: Simplify right side
    644,851.91x = 358,262,361,425.42
  5. Step 5: Solve for x
    x = 358,262,361,425.42/644,851.91
  6. Step 6: Final answer
    x = 555,573.08

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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.