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Finding the Fourth Proportional to 710,782.03, 980,905.58 and 388,513.81

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Solution

The fourth proportional to 710,782.03, 980,905.58 and 388,513.81 is: 536,163.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,782.03 : 980,905.58 = 388,513.81 : x
  2. Step 2: Convert to fraction form
    710,782.03/980,905.58 = 388,513.81/x
  3. Step 3: Cross multiply
    710,782.03x = 980,905.58 × 388,513.81
  4. Step 4: Simplify right side
    710,782.03x = 381,095,364,136.06
  5. Step 5: Solve for x
    x = 381,095,364,136.06/710,782.03
  6. Step 6: Final answer
    x = 536,163.48

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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.