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Finding the Fourth Proportional to 666,679.68, 920,106 and 376,349.76

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Solution

The fourth proportional to 666,679.68, 920,106 and 376,349.76 is: 519,412.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,679.68 : 920,106 = 376,349.76 : x
  2. Step 2: Convert to fraction form
    666,679.68/920,106 = 376,349.76/x
  3. Step 3: Cross multiply
    666,679.68x = 920,106 × 376,349.76
  4. Step 4: Simplify right side
    666,679.68x = 346,281,672,274.56
  5. Step 5: Solve for x
    x = 346,281,672,274.56/666,679.68
  6. Step 6: Final answer
    x = 519,412.37

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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.