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Finding the Fourth Proportional to 280,688.32, 421,036.16 and 93,699.68

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Solution

The fourth proportional to 280,688.32, 421,036.16 and 93,699.68 is: 140,550.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,688.32 : 421,036.16 = 93,699.68 : x
  2. Step 2: Convert to fraction form
    280,688.32/421,036.16 = 93,699.68/x
  3. Step 3: Cross multiply
    280,688.32x = 421,036.16 × 93,699.68
  4. Step 4: Simplify right side
    280,688.32x = 39,450,953,460.43
  5. Step 5: Solve for x
    x = 39,450,953,460.43/280,688.32
  6. Step 6: Final answer
    x = 140,550.75

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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.