Home / 858,530.40-1,287,795.60-438,626.40

Finding the Fourth Proportional to 858,530.40, 1,287,795.60 and 438,626.40

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Solution

The fourth proportional to 858,530.40, 1,287,795.60 and 438,626.40 is: 657,939.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,530.40 : 1,287,795.60 = 438,626.40 : x
  2. Step 2: Convert to fraction form
    858,530.40/1,287,795.60 = 438,626.40/x
  3. Step 3: Cross multiply
    858,530.40x = 1,287,795.60 × 438,626.40
  4. Step 4: Simplify right side
    858,530.40x = 564,861,147,963.84
  5. Step 5: Solve for x
    x = 564,861,147,963.84/858,530.40
  6. Step 6: Final answer
    x = 657,939.60

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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.