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Finding the Fourth Proportional to 663,299.60, 915,356.54 and 376,835.40

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Solution

The fourth proportional to 663,299.60, 915,356.54 and 376,835.40 is: 520,034.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,299.60 : 915,356.54 = 376,835.40 : x
  2. Step 2: Convert to fraction form
    663,299.60/915,356.54 = 376,835.40/x
  3. Step 3: Cross multiply
    663,299.60x = 915,356.54 × 376,835.40
  4. Step 4: Simplify right side
    663,299.60x = 344,938,746,009.34
  5. Step 5: Solve for x
    x = 344,938,746,009.34/663,299.60
  6. Step 6: Final answer
    x = 520,034.61

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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.