Home / 430,828.65-645,280.68-312,227.64

Finding the Fourth Proportional to 430,828.65, 645,280.68 and 312,227.64

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Solution

The fourth proportional to 430,828.65, 645,280.68 and 312,227.64 is: 467,644.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,828.65 : 645,280.68 = 312,227.64 : x
  2. Step 2: Convert to fraction form
    430,828.65/645,280.68 = 312,227.64/x
  3. Step 3: Cross multiply
    430,828.65x = 645,280.68 × 312,227.64
  4. Step 4: Simplify right side
    430,828.65x = 201,474,463,854.00
  5. Step 5: Solve for x
    x = 201,474,463,854.00/430,828.65
  6. Step 6: Final answer
    x = 467,644.07

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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.