Home / 644,289.66-889,564.53-402,680.83

Finding the Fourth Proportional to 644,289.66, 889,564.53 and 402,680.83

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Solution

The fourth proportional to 644,289.66, 889,564.53 and 402,680.83 is: 555,977.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,289.66 : 889,564.53 = 402,680.83 : x
  2. Step 2: Convert to fraction form
    644,289.66/889,564.53 = 402,680.83/x
  3. Step 3: Cross multiply
    644,289.66x = 889,564.53 × 402,680.83
  4. Step 4: Simplify right side
    644,289.66x = 358,210,583,278.96
  5. Step 5: Solve for x
    x = 358,210,583,278.96/644,289.66
  6. Step 6: Final answer
    x = 555,977.55

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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.