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Finding the Fourth Proportional to 456,686.40, 685,029.60 and 207,368.40

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Solution

The fourth proportional to 456,686.40, 685,029.60 and 207,368.40 is: 311,052.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,686.40 : 685,029.60 = 207,368.40 : x
  2. Step 2: Convert to fraction form
    456,686.40/685,029.60 = 207,368.40/x
  3. Step 3: Cross multiply
    456,686.40x = 685,029.60 × 207,368.40
  4. Step 4: Simplify right side
    456,686.40x = 142,053,492,104.64
  5. Step 5: Solve for x
    x = 142,053,492,104.64/456,686.40
  6. Step 6: Final answer
    x = 311,052.60

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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.