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Finding the Fourth Proportional to 978,178.20, 1,467,267.30 and 853,762.20

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Solution

The fourth proportional to 978,178.20, 1,467,267.30 and 853,762.20 is: 1,280,643.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,178.20 : 1,467,267.30 = 853,762.20 : x
  2. Step 2: Convert to fraction form
    978,178.20/1,467,267.30 = 853,762.20/x
  3. Step 3: Cross multiply
    978,178.20x = 1,467,267.30 × 853,762.20
  4. Step 4: Simplify right side
    978,178.20x = 1,252,697,358,036.06
  5. Step 5: Solve for x
    x = 1,252,697,358,036.06/978,178.20
  6. Step 6: Final answer
    x = 1,280,643.30

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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.