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Finding the Fourth Proportional to 864,009.60, 1,296,014.40 and 864,009.60

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Solution

The fourth proportional to 864,009.60, 1,296,014.40 and 864,009.60 is: 1,296,014.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,009.60 : 1,296,014.40 = 864,009.60 : x
  2. Step 2: Convert to fraction form
    864,009.60/1,296,014.40 = 864,009.60/x
  3. Step 3: Cross multiply
    864,009.60x = 1,296,014.40 × 864,009.60
  4. Step 4: Simplify right side
    864,009.60x = 1,119,768,883,338.24
  5. Step 5: Solve for x
    x = 1,119,768,883,338.24/864,009.60
  6. Step 6: Final answer
    x = 1,296,014.40

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Double scale
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Similar ratio
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1.5x scale

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.