Home / 858,455.94-1,287,386.46-431,826.87

Finding the Fourth Proportional to 858,455.94, 1,287,386.46 and 431,826.87

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Solution

The fourth proportional to 858,455.94, 1,287,386.46 and 431,826.87 is: 647,590.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,455.94 : 1,287,386.46 = 431,826.87 : x
  2. Step 2: Convert to fraction form
    858,455.94/1,287,386.46 = 431,826.87/x
  3. Step 3: Cross multiply
    858,455.94x = 1,287,386.46 × 431,826.87
  4. Step 4: Simplify right side
    858,455.94x = 555,928,065,502.18
  5. Step 5: Solve for x
    x = 555,928,065,502.18/858,455.94
  6. Step 6: Final answer
    x = 647,590.68

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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.