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Finding the Fourth Proportional to 666,712.88, 920,056.76 and 360,782.56

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Solution

The fourth proportional to 666,712.88, 920,056.76 and 360,782.56 is: 497,876.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,712.88 : 920,056.76 = 360,782.56 : x
  2. Step 2: Convert to fraction form
    666,712.88/920,056.76 = 360,782.56/x
  3. Step 3: Cross multiply
    666,712.88x = 920,056.76 × 360,782.56
  4. Step 4: Simplify right side
    666,712.88x = 331,940,429,114.05
  5. Step 5: Solve for x
    x = 331,940,429,114.05/666,712.88
  6. Step 6: Final answer
    x = 497,876.13

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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.