Home / 821,487.72-1,229,427.90-688,518.12

Finding the Fourth Proportional to 821,487.72, 1,229,427.90 and 688,518.12

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Solution

The fourth proportional to 821,487.72, 1,229,427.90 and 688,518.12 is: 1,030,427.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,487.72 : 1,229,427.90 = 688,518.12 : x
  2. Step 2: Convert to fraction form
    821,487.72/1,229,427.90 = 688,518.12/x
  3. Step 3: Cross multiply
    821,487.72x = 1,229,427.90 × 688,518.12
  4. Step 4: Simplify right side
    821,487.72x = 846,483,386,383.55
  5. Step 5: Solve for x
    x = 846,483,386,383.55/821,487.72
  6. Step 6: Final answer
    x = 1,030,427.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.