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Finding the Fourth Proportional to 710,445.89, 980,403.86 and 388,149.05

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Solution

The fourth proportional to 710,445.89, 980,403.86 and 388,149.05 is: 535,639.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,445.89 : 980,403.86 = 388,149.05 : x
  2. Step 2: Convert to fraction form
    710,445.89/980,403.86 = 388,149.05/x
  3. Step 3: Cross multiply
    710,445.89x = 980,403.86 × 388,149.05
  4. Step 4: Simplify right side
    710,445.89x = 380,542,820,032.57
  5. Step 5: Solve for x
    x = 380,542,820,032.57/710,445.89
  6. Step 6: Final answer
    x = 535,639.42

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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.