Home / 712,959.40-1,069,439.10-665,720.20

Finding the Fourth Proportional to 712,959.40, 1,069,439.10 and 665,720.20

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Solution

The fourth proportional to 712,959.40, 1,069,439.10 and 665,720.20 is: 998,580.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,959.40 : 1,069,439.10 = 665,720.20 : x
  2. Step 2: Convert to fraction form
    712,959.40/1,069,439.10 = 665,720.20/x
  3. Step 3: Cross multiply
    712,959.40x = 1,069,439.10 × 665,720.20
  4. Step 4: Simplify right side
    712,959.40x = 711,947,211,539.82
  5. Step 5: Solve for x
    x = 711,947,211,539.82/712,959.40
  6. Step 6: Final answer
    x = 998,580.30

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Similar ratio
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1.5x scale

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.