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Finding the Fourth Proportional to 421,714.20, 581,980.13 and 230,727.60

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Solution

The fourth proportional to 421,714.20, 581,980.13 and 230,727.60 is: 318,412.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,714.20 : 581,980.13 = 230,727.60 : x
  2. Step 2: Convert to fraction form
    421,714.20/581,980.13 = 230,727.60/x
  3. Step 3: Cross multiply
    421,714.20x = 581,980.13 × 230,727.60
  4. Step 4: Simplify right side
    421,714.20x = 134,278,878,642.59
  5. Step 5: Solve for x
    x = 134,278,878,642.59/421,714.20
  6. Step 6: Final answer
    x = 318,412.04

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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.