Home / 642,492.36-886,631.94-400,758.12

Finding the Fourth Proportional to 642,492.36, 886,631.94 and 400,758.12

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Solution

The fourth proportional to 642,492.36, 886,631.94 and 400,758.12 is: 553,041.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,492.36 : 886,631.94 = 400,758.12 : x
  2. Step 2: Convert to fraction form
    642,492.36/886,631.94 = 400,758.12/x
  3. Step 3: Cross multiply
    642,492.36x = 886,631.94 × 400,758.12
  4. Step 4: Simplify right side
    642,492.36x = 355,324,949,406.35
  5. Step 5: Solve for x
    x = 355,324,949,406.35/642,492.36
  6. Step 6: Final answer
    x = 553,041.52

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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.