Home / 870,142.08-1,305,465.84-309,220.32

Finding the Fourth Proportional to 870,142.08, 1,305,465.84 and 309,220.32

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Solution

The fourth proportional to 870,142.08, 1,305,465.84 and 309,220.32 is: 463,920.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,142.08 : 1,305,465.84 = 309,220.32 : x
  2. Step 2: Convert to fraction form
    870,142.08/1,305,465.84 = 309,220.32/x
  3. Step 3: Cross multiply
    870,142.08x = 1,305,465.84 × 309,220.32
  4. Step 4: Simplify right side
    870,142.08x = 403,676,564,793.87
  5. Step 5: Solve for x
    x = 403,676,564,793.87/870,142.08
  6. Step 6: Final answer
    x = 463,920.29

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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.