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Finding the Fourth Proportional to 815,762.16, 1,223,818.02 and 342,174.60

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Solution

The fourth proportional to 815,762.16, 1,223,818.02 and 342,174.60 is: 513,335.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,762.16 : 1,223,818.02 = 342,174.60 : x
  2. Step 2: Convert to fraction form
    815,762.16/1,223,818.02 = 342,174.60/x
  3. Step 3: Cross multiply
    815,762.16x = 1,223,818.02 × 342,174.60
  4. Step 4: Simplify right side
    815,762.16x = 418,759,441,466.29
  5. Step 5: Solve for x
    x = 418,759,441,466.29/815,762.16
  6. Step 6: Final answer
    x = 513,335.21

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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.