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Finding the Fourth Proportional to 710,599.55, 980,640.20 and 388,323.23

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Solution

The fourth proportional to 710,599.55, 980,640.20 and 388,323.23 is: 535,893.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,599.55 : 980,640.20 = 388,323.23 : x
  2. Step 2: Convert to fraction form
    710,599.55/980,640.20 = 388,323.23/x
  3. Step 3: Cross multiply
    710,599.55x = 980,640.20 × 388,323.23
  4. Step 4: Simplify right side
    710,599.55x = 380,805,365,999.45
  5. Step 5: Solve for x
    x = 380,805,365,999.45/710,599.55
  6. Step 6: Final answer
    x = 535,893.06

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1.5x scale

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.