Home / 664,975.10-917,666.67-378,495.20

Finding the Fourth Proportional to 664,975.10, 917,666.67 and 378,495.20

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Solution

The fourth proportional to 664,975.10, 917,666.67 and 378,495.20 is: 522,323.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,975.10 : 917,666.67 = 378,495.20 : x
  2. Step 2: Convert to fraction form
    664,975.10/917,666.67 = 378,495.20/x
  3. Step 3: Cross multiply
    664,975.10x = 917,666.67 × 378,495.20
  4. Step 4: Simplify right side
    664,975.10x = 347,332,425,206.65
  5. Step 5: Solve for x
    x = 347,332,425,206.65/664,975.10
  6. Step 6: Final answer
    x = 522,323.96

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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.