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Finding the Fourth Proportional to 491,574.80, 689,604.40 and 491,574.80

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Solution

The fourth proportional to 491,574.80, 689,604.40 and 491,574.80 is: 689,604.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,574.80 : 689,604.40 = 491,574.80 : x
  2. Step 2: Convert to fraction form
    491,574.80/689,604.40 = 491,574.80/x
  3. Step 3: Cross multiply
    491,574.80x = 689,604.40 × 491,574.80
  4. Step 4: Simplify right side
    491,574.80x = 338,992,145,009.12
  5. Step 5: Solve for x
    x = 338,992,145,009.12/491,574.80
  6. Step 6: Final answer
    x = 689,604.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.