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Finding the Fourth Proportional to 666,459.63, 919,691.42 and 380,071.89

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Solution

The fourth proportional to 666,459.63, 919,691.42 and 380,071.89 is: 524,486.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,459.63 : 919,691.42 = 380,071.89 : x
  2. Step 2: Convert to fraction form
    666,459.63/919,691.42 = 380,071.89/x
  3. Step 3: Cross multiply
    666,459.63x = 919,691.42 × 380,071.89
  4. Step 4: Simplify right side
    666,459.63x = 349,548,854,315.82
  5. Step 5: Solve for x
    x = 349,548,854,315.82/666,459.63
  6. Step 6: Final answer
    x = 524,486.16

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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.