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Finding the Fourth Proportional to 978,833.42, 1,351,369.23 and 616,567.80

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Solution

The fourth proportional to 978,833.42, 1,351,369.23 and 616,567.80 is: 851,228.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,833.42 : 1,351,369.23 = 616,567.80 : x
  2. Step 2: Convert to fraction form
    978,833.42/1,351,369.23 = 616,567.80/x
  3. Step 3: Cross multiply
    978,833.42x = 1,351,369.23 × 616,567.80
  4. Step 4: Simplify right side
    978,833.42x = 833,210,753,128.79
  5. Step 5: Solve for x
    x = 833,210,753,128.79/978,833.42
  6. Step 6: Final answer
    x = 851,228.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.