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Finding the Fourth Proportional to 472,215.20, 708,322.80 and 313,930.40

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Solution

The fourth proportional to 472,215.20, 708,322.80 and 313,930.40 is: 470,895.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,215.20 : 708,322.80 = 313,930.40 : x
  2. Step 2: Convert to fraction form
    472,215.20/708,322.80 = 313,930.40/x
  3. Step 3: Cross multiply
    472,215.20x = 708,322.80 × 313,930.40
  4. Step 4: Simplify right side
    472,215.20x = 222,364,059,933.12
  5. Step 5: Solve for x
    x = 222,364,059,933.12/472,215.20
  6. Step 6: Final answer
    x = 470,895.60

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Similar ratio
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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.