Home / 644,289.41-889,564.19-402,680.58

Finding the Fourth Proportional to 644,289.41, 889,564.19 and 402,680.58

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Solution

The fourth proportional to 644,289.41, 889,564.19 and 402,680.58 is: 555,977.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,289.41 : 889,564.19 = 402,680.58 : x
  2. Step 2: Convert to fraction form
    644,289.41/889,564.19 = 402,680.58/x
  3. Step 3: Cross multiply
    644,289.41x = 889,564.19 × 402,680.58
  4. Step 4: Simplify right side
    644,289.41x = 358,210,221,963.03
  5. Step 5: Solve for x
    x = 358,210,221,963.03/644,289.41
  6. Step 6: Final answer
    x = 555,977.20

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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.