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Finding the Fourth Proportional to 666,686.48, 920,026.92 and 364,879.76

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Solution

The fourth proportional to 666,686.48, 920,026.92 and 364,879.76 is: 503,533.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,686.48 : 920,026.92 = 364,879.76 : x
  2. Step 2: Convert to fraction form
    666,686.48/920,026.92 = 364,879.76/x
  3. Step 3: Cross multiply
    666,686.48x = 920,026.92 × 364,879.76
  4. Step 4: Simplify right side
    666,686.48x = 335,699,201,763.14
  5. Step 5: Solve for x
    x = 335,699,201,763.14/666,686.48
  6. Step 6: Final answer
    x = 503,533.84

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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.