Home / 644,289.12-889,563.84-402,680.16

Finding the Fourth Proportional to 644,289.12, 889,563.84 and 402,680.16

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Solution

The fourth proportional to 644,289.12, 889,563.84 and 402,680.16 is: 555,976.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,289.12 : 889,563.84 = 402,680.16 : x
  2. Step 2: Convert to fraction form
    644,289.12/889,563.84 = 402,680.16/x
  3. Step 3: Cross multiply
    644,289.12x = 889,563.84 × 402,680.16
  4. Step 4: Simplify right side
    644,289.12x = 358,209,709,421.41
  5. Step 5: Solve for x
    x = 358,209,709,421.41/644,289.12
  6. Step 6: Final answer
    x = 555,976.65

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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.