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Finding the Fourth Proportional to 710,629.68, 980,627.20 and 388,342.24

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Solution

The fourth proportional to 710,629.68, 980,627.20 and 388,342.24 is: 535,889.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,629.68 : 980,627.20 = 388,342.24 : x
  2. Step 2: Convert to fraction form
    710,629.68/980,627.20 = 388,342.24/x
  3. Step 3: Cross multiply
    710,629.68x = 980,627.20 × 388,342.24
  4. Step 4: Simplify right side
    710,629.68x = 380,818,963,452.93
  5. Step 5: Solve for x
    x = 380,818,963,452.93/710,629.68
  6. Step 6: Final answer
    x = 535,889.47

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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.