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Finding the Fourth Proportional to 407,813.60, 611,720.40 and 112,325.60

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Solution

The fourth proportional to 407,813.60, 611,720.40 and 112,325.60 is: 168,488.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,813.60 : 611,720.40 = 112,325.60 : x
  2. Step 2: Convert to fraction form
    407,813.60/611,720.40 = 112,325.60/x
  3. Step 3: Cross multiply
    407,813.60x = 611,720.40 × 112,325.60
  4. Step 4: Simplify right side
    407,813.60x = 68,711,860,962.24
  5. Step 5: Solve for x
    x = 68,711,860,962.24/407,813.60
  6. Step 6: Final answer
    x = 168,488.40

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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.