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Finding the Fourth Proportional to 230,386.64, 317,922.30 and 128,423.20

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Solution

The fourth proportional to 230,386.64, 317,922.30 and 128,423.20 is: 177,217.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,386.64 : 317,922.30 = 128,423.20 : x
  2. Step 2: Convert to fraction form
    230,386.64/317,922.30 = 128,423.20/x
  3. Step 3: Cross multiply
    230,386.64x = 317,922.30 × 128,423.20
  4. Step 4: Simplify right side
    230,386.64x = 40,828,599,117.36
  5. Step 5: Solve for x
    x = 40,828,599,117.36/230,386.64
  6. Step 6: Final answer
    x = 177,217.74

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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.