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Finding the Fourth Proportional to 864,340.80, 1,296,705.60 and 265,329.60

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Solution

The fourth proportional to 864,340.80, 1,296,705.60 and 265,329.60 is: 398,054.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,340.80 : 1,296,705.60 = 265,329.60 : x
  2. Step 2: Convert to fraction form
    864,340.80/1,296,705.60 = 265,329.60/x
  3. Step 3: Cross multiply
    864,340.80x = 1,296,705.60 × 265,329.60
  4. Step 4: Simplify right side
    864,340.80x = 344,054,378,165.76
  5. Step 5: Solve for x
    x = 344,054,378,165.76/864,340.80
  6. Step 6: Final answer
    x = 398,054.08

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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.