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Finding the Fourth Proportional to 870,470.60, 1,305,705.90 and 330,720.20

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Solution

The fourth proportional to 870,470.60, 1,305,705.90 and 330,720.20 is: 496,080.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,470.60 : 1,305,705.90 = 330,720.20 : x
  2. Step 2: Convert to fraction form
    870,470.60/1,305,705.90 = 330,720.20/x
  3. Step 3: Cross multiply
    870,470.60x = 1,305,705.90 × 330,720.20
  4. Step 4: Simplify right side
    870,470.60x = 431,823,316,389.18
  5. Step 5: Solve for x
    x = 431,823,316,389.18/870,470.60
  6. Step 6: Final answer
    x = 496,080.30

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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.