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Finding the Fourth Proportional to 429,803, 644,667.36 and 145,487.45

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Solution

The fourth proportional to 429,803, 644,667.36 and 145,487.45 is: 218,218.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,803 : 644,667.36 = 145,487.45 : x
  2. Step 2: Convert to fraction form
    429,803/644,667.36 = 145,487.45/x
  3. Step 3: Cross multiply
    429,803x = 644,667.36 × 145,487.45
  4. Step 4: Simplify right side
    429,803x = 93,791,010,304.63
  5. Step 5: Solve for x
    x = 93,791,010,304.63/429,803
  6. Step 6: Final answer
    x = 218,218.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.