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Finding the Fourth Proportional to 710,327.42, 980,239.47 and 388,029.23

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Solution

The fourth proportional to 710,327.42, 980,239.47 and 388,029.23 is: 535,473.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,327.42 : 980,239.47 = 388,029.23 : x
  2. Step 2: Convert to fraction form
    710,327.42/980,239.47 = 388,029.23/x
  3. Step 3: Cross multiply
    710,327.42x = 980,239.47 × 388,029.23
  4. Step 4: Simplify right side
    710,327.42x = 380,361,561,858.51
  5. Step 5: Solve for x
    x = 380,361,561,858.51/710,327.42
  6. Step 6: Final answer
    x = 535,473.58

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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.