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Finding the Fourth Proportional to 978,511.20, 1,466,017.20 and 828,045.60

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Solution

The fourth proportional to 978,511.20, 1,466,017.20 and 828,045.60 is: 1,240,587.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,511.20 : 1,466,017.20 = 828,045.60 : x
  2. Step 2: Convert to fraction form
    978,511.20/1,466,017.20 = 828,045.60/x
  3. Step 3: Cross multiply
    978,511.20x = 1,466,017.20 × 828,045.60
  4. Step 4: Simplify right side
    978,511.20x = 1,213,929,091,984.32
  5. Step 5: Solve for x
    x = 1,213,929,091,984.32/978,511.20
  6. Step 6: Final answer
    x = 1,240,587.84

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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.