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Finding the Fourth Proportional to 586,890.56, 809,913.12 and 318,618.56

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Solution

The fourth proportional to 586,890.56, 809,913.12 and 318,618.56 is: 439,695.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,890.56 : 809,913.12 = 318,618.56 : x
  2. Step 2: Convert to fraction form
    586,890.56/809,913.12 = 318,618.56/x
  3. Step 3: Cross multiply
    586,890.56x = 809,913.12 × 318,618.56
  4. Step 4: Simplify right side
    586,890.56x = 258,053,352,019.51
  5. Step 5: Solve for x
    x = 258,053,352,019.51/586,890.56
  6. Step 6: Final answer
    x = 439,695.86

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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.