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Finding the Fourth Proportional to 666,444.63, 919,670.72 and 380,056.89

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Solution

The fourth proportional to 666,444.63, 919,670.72 and 380,056.89 is: 524,465.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,444.63 : 919,670.72 = 380,056.89 : x
  2. Step 2: Convert to fraction form
    666,444.63/919,670.72 = 380,056.89/x
  3. Step 3: Cross multiply
    666,444.63x = 919,670.72 × 380,056.89
  4. Step 4: Simplify right side
    666,444.63x = 349,527,191,766.98
  5. Step 5: Solve for x
    x = 349,527,191,766.98/666,444.63
  6. Step 6: Final answer
    x = 524,465.46

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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.