Home / 947,394.60-1,420,400.70-386,140.20

Finding the Fourth Proportional to 947,394.60, 1,420,400.70 and 386,140.20

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Solution

The fourth proportional to 947,394.60, 1,420,400.70 and 386,140.20 is: 578,928.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    947,394.60 : 1,420,400.70 = 386,140.20 : x
  2. Step 2: Convert to fraction form
    947,394.60/1,420,400.70 = 386,140.20/x
  3. Step 3: Cross multiply
    947,394.60x = 1,420,400.70 × 386,140.20
  4. Step 4: Simplify right side
    947,394.60x = 548,473,810,378.14
  5. Step 5: Solve for x
    x = 548,473,810,378.14/947,394.60
  6. Step 6: Final answer
    x = 578,928.58

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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.