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Finding the Fourth Proportional to 656,428.80, 905,890.72 and 369,933.12

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Solution

The fourth proportional to 656,428.80, 905,890.72 and 369,933.12 is: 510,518.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,428.80 : 905,890.72 = 369,933.12 : x
  2. Step 2: Convert to fraction form
    656,428.80/905,890.72 = 369,933.12/x
  3. Step 3: Cross multiply
    656,428.80x = 905,890.72 × 369,933.12
  4. Step 4: Simplify right side
    656,428.80x = 335,118,980,428.65
  5. Step 5: Solve for x
    x = 335,118,980,428.65/656,428.80
  6. Step 6: Final answer
    x = 510,518.40

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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.