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Finding the Fourth Proportional to 443,931.63, 665,903.59 and 144,413.78

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Solution

The fourth proportional to 443,931.63, 665,903.59 and 144,413.78 is: 216,622.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,931.63 : 665,903.59 = 144,413.78 : x
  2. Step 2: Convert to fraction form
    443,931.63/665,903.59 = 144,413.78/x
  3. Step 3: Cross multiply
    443,931.63x = 665,903.59 × 144,413.78
  4. Step 4: Simplify right side
    443,931.63x = 96,165,651,263.08
  5. Step 5: Solve for x
    x = 96,165,651,263.08/443,931.63
  6. Step 6: Final answer
    x = 216,622.66

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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.