Home / 916,976.40-1,372,840.20-812,000.40

Finding the Fourth Proportional to 916,976.40, 1,372,840.20 and 812,000.40

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Solution

The fourth proportional to 916,976.40, 1,372,840.20 and 812,000.40 is: 1,215,676.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,976.40 : 1,372,840.20 = 812,000.40 : x
  2. Step 2: Convert to fraction form
    916,976.40/1,372,840.20 = 812,000.40/x
  3. Step 3: Cross multiply
    916,976.40x = 1,372,840.20 × 812,000.40
  4. Step 4: Simplify right side
    916,976.40x = 1,114,746,791,536.08
  5. Step 5: Solve for x
    x = 1,114,746,791,536.08/916,976.40
  6. Step 6: Final answer
    x = 1,215,676.64

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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.