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Finding the Fourth Proportional to 710,608.95, 980,638.35 and 388,321.09

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Solution

The fourth proportional to 710,608.95, 980,638.35 and 388,321.09 is: 535,882.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,608.95 : 980,638.35 = 388,321.09 : x
  2. Step 2: Convert to fraction form
    710,608.95/980,638.35 = 388,321.09/x
  3. Step 3: Cross multiply
    710,608.95x = 980,638.35 × 388,321.09
  4. Step 4: Simplify right side
    710,608.95x = 380,802,549,060.00
  5. Step 5: Solve for x
    x = 380,802,549,060.00/710,608.95
  6. Step 6: Final answer
    x = 535,882.01

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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.