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Finding the Fourth Proportional to 617,915.40, 926,873.10 and 551,430.60

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Solution

The fourth proportional to 617,915.40, 926,873.10 and 551,430.60 is: 827,145.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,915.40 : 926,873.10 = 551,430.60 : x
  2. Step 2: Convert to fraction form
    617,915.40/926,873.10 = 551,430.60/x
  3. Step 3: Cross multiply
    617,915.40x = 926,873.10 × 551,430.60
  4. Step 4: Simplify right side
    617,915.40x = 511,106,189,656.86
  5. Step 5: Solve for x
    x = 511,106,189,656.86/617,915.40
  6. Step 6: Final answer
    x = 827,145.90

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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.