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Finding the Fourth Proportional to 710,469.02, 980,435.66 and 388,172.18

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Solution

The fourth proportional to 710,469.02, 980,435.66 and 388,172.18 is: 535,671.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,469.02 : 980,435.66 = 388,172.18 : x
  2. Step 2: Convert to fraction form
    710,469.02/980,435.66 = 388,172.18/x
  3. Step 3: Cross multiply
    710,469.02x = 980,435.66 × 388,172.18
  4. Step 4: Simplify right side
    710,469.02x = 380,577,840,648.90
  5. Step 5: Solve for x
    x = 380,577,840,648.90/710,469.02
  6. Step 6: Final answer
    x = 535,671.27

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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.