Home / 858,087.36-1,287,089.43-318,448.83

Finding the Fourth Proportional to 858,087.36, 1,287,089.43 and 318,448.83

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Solution

The fourth proportional to 858,087.36, 1,287,089.43 and 318,448.83 is: 477,657.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,087.36 : 1,287,089.43 = 318,448.83 : x
  2. Step 2: Convert to fraction form
    858,087.36/1,287,089.43 = 318,448.83/x
  3. Step 3: Cross multiply
    858,087.36x = 1,287,089.43 × 318,448.83
  4. Step 4: Simplify right side
    858,087.36x = 409,872,123,088.87
  5. Step 5: Solve for x
    x = 409,872,123,088.87/858,087.36
  6. Step 6: Final answer
    x = 477,657.80

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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.