Home / 839,117.20-1,258,675.80-389,688.70

Finding the Fourth Proportional to 839,117.20, 1,258,675.80 and 389,688.70

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Solution

The fourth proportional to 839,117.20, 1,258,675.80 and 389,688.70 is: 584,533.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,117.20 : 1,258,675.80 = 389,688.70 : x
  2. Step 2: Convert to fraction form
    839,117.20/1,258,675.80 = 389,688.70/x
  3. Step 3: Cross multiply
    839,117.20x = 1,258,675.80 × 389,688.70
  4. Step 4: Simplify right side
    839,117.20x = 490,491,736,223.46
  5. Step 5: Solve for x
    x = 490,491,736,223.46/839,117.20
  6. Step 6: Final answer
    x = 584,533.05

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Double scale
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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.