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Finding the Fourth Proportional to 710,745.95, 980,852.07 and 388,449.13

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Solution

The fourth proportional to 710,745.95, 980,852.07 and 388,449.13 is: 536,072.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,745.95 : 980,852.07 = 388,449.13 : x
  2. Step 2: Convert to fraction form
    710,745.95/980,852.07 = 388,449.13/x
  3. Step 3: Cross multiply
    710,745.95x = 980,852.07 × 388,449.13
  4. Step 4: Simplify right side
    710,745.95x = 381,011,134,926.96
  5. Step 5: Solve for x
    x = 381,011,134,926.96/710,745.95
  6. Step 6: Final answer
    x = 536,072.18

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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.