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Finding the Fourth Proportional to 870,873.45, 1,306,392.62 and 338,435.54

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Solution

The fourth proportional to 870,873.45, 1,306,392.62 and 338,435.54 is: 507,685.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,873.45 : 1,306,392.62 = 338,435.54 : x
  2. Step 2: Convert to fraction form
    870,873.45/1,306,392.62 = 338,435.54/x
  3. Step 3: Cross multiply
    870,873.45x = 1,306,392.62 × 338,435.54
  4. Step 4: Simplify right side
    870,873.45x = 442,129,683,577.57
  5. Step 5: Solve for x
    x = 442,129,683,577.57/870,873.45
  6. Step 6: Final answer
    x = 507,685.34

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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.