Home / 853,107.64-1,280,448.68-432,678.76

Finding the Fourth Proportional to 853,107.64, 1,280,448.68 and 432,678.76

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Solution

The fourth proportional to 853,107.64, 1,280,448.68 and 432,678.76 is: 649,417.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,107.64 : 1,280,448.68 = 432,678.76 : x
  2. Step 2: Convert to fraction form
    853,107.64/1,280,448.68 = 432,678.76/x
  3. Step 3: Cross multiply
    853,107.64x = 1,280,448.68 × 432,678.76
  4. Step 4: Simplify right side
    853,107.64x = 554,022,947,106.04
  5. Step 5: Solve for x
    x = 554,022,947,106.04/853,107.64
  6. Step 6: Final answer
    x = 649,417.40

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Double scale
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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.