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Finding the Fourth Proportional to 665,862.12, 997,630.56 and 554,259.78

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Solution

The fourth proportional to 665,862.12, 997,630.56 and 554,259.78 is: 830,421.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,862.12 : 997,630.56 = 554,259.78 : x
  2. Step 2: Convert to fraction form
    665,862.12/997,630.56 = 554,259.78/x
  3. Step 3: Cross multiply
    665,862.12x = 997,630.56 × 554,259.78
  4. Step 4: Simplify right side
    665,862.12x = 552,946,494,706.88
  5. Step 5: Solve for x
    x = 552,946,494,706.88/665,862.12
  6. Step 6: Final answer
    x = 830,421.91

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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.