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Finding the Fourth Proportional to 1,079,724.40, 1,621,045.80 and 630,905.20

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Solution

The fourth proportional to 1,079,724.40, 1,621,045.80 and 630,905.20 is: 947,210.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079,724.40 : 1,621,045.80 = 630,905.20 : x
  2. Step 2: Convert to fraction form
    1,079,724.40/1,621,045.80 = 630,905.20/x
  3. Step 3: Cross multiply
    1,079,724.40x = 1,621,045.80 × 630,905.20
  4. Step 4: Simplify right side
    1,079,724.40x = 1,022,726,224,658.16
  5. Step 5: Solve for x
    x = 1,022,726,224,658.16/1,079,724.40
  6. Step 6: Final answer
    x = 947,210.44

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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.