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Finding the Fourth Proportional to 666,768.92, 920,146.84 and 380,303.51

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Solution

The fourth proportional to 666,768.92, 920,146.84 and 380,303.51 is: 524,822.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,768.92 : 920,146.84 = 380,303.51 : x
  2. Step 2: Convert to fraction form
    666,768.92/920,146.84 = 380,303.51/x
  3. Step 3: Cross multiply
    666,768.92x = 920,146.84 × 380,303.51
  4. Step 4: Simplify right side
    666,768.92x = 349,935,067,415.92
  5. Step 5: Solve for x
    x = 349,935,067,415.92/666,768.92
  6. Step 6: Final answer
    x = 524,822.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.