Home / 688,720.40-1,033,080.60-644,105.60

Finding the Fourth Proportional to 688,720.40, 1,033,080.60 and 644,105.60

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Solution

The fourth proportional to 688,720.40, 1,033,080.60 and 644,105.60 is: 966,158.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,720.40 : 1,033,080.60 = 644,105.60 : x
  2. Step 2: Convert to fraction form
    688,720.40/1,033,080.60 = 644,105.60/x
  3. Step 3: Cross multiply
    688,720.40x = 1,033,080.60 × 644,105.60
  4. Step 4: Simplify right side
    688,720.40x = 665,412,999,711.36
  5. Step 5: Solve for x
    x = 665,412,999,711.36/688,720.40
  6. Step 6: Final answer
    x = 966,158.40

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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.