Home / 630,738.54-870,612.27-389,096.46

Finding the Fourth Proportional to 630,738.54, 870,612.27 and 389,096.46

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Solution

The fourth proportional to 630,738.54, 870,612.27 and 389,096.46 is: 537,072.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,738.54 : 870,612.27 = 389,096.46 : x
  2. Step 2: Convert to fraction form
    630,738.54/870,612.27 = 389,096.46/x
  3. Step 3: Cross multiply
    630,738.54x = 870,612.27 × 389,096.46
  4. Step 4: Simplify right side
    630,738.54x = 338,752,152,289.56
  5. Step 5: Solve for x
    x = 338,752,152,289.56/630,738.54
  6. Step 6: Final answer
    x = 537,072.23

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.