Home / 874,678.20-1,312,017.30-313,639.80

Finding the Fourth Proportional to 874,678.20, 1,312,017.30 and 313,639.80

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Solution

The fourth proportional to 874,678.20, 1,312,017.30 and 313,639.80 is: 470,459.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,678.20 : 1,312,017.30 = 313,639.80 : x
  2. Step 2: Convert to fraction form
    874,678.20/1,312,017.30 = 313,639.80/x
  3. Step 3: Cross multiply
    874,678.20x = 1,312,017.30 × 313,639.80
  4. Step 4: Simplify right side
    874,678.20x = 411,500,843,568.54
  5. Step 5: Solve for x
    x = 411,500,843,568.54/874,678.20
  6. Step 6: Final answer
    x = 470,459.70

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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.