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Finding the Fourth Proportional to 710,849.21, 980,971.84 and 388,560.59

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Solution

The fourth proportional to 710,849.21, 980,971.84 and 388,560.59 is: 536,213.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,849.21 : 980,971.84 = 388,560.59 : x
  2. Step 2: Convert to fraction form
    710,849.21/980,971.84 = 388,560.59/x
  3. Step 3: Cross multiply
    710,849.21x = 980,971.84 × 388,560.59
  4. Step 4: Simplify right side
    710,849.21x = 381,166,998,404.81
  5. Step 5: Solve for x
    x = 381,166,998,404.81/710,849.21
  6. Step 6: Final answer
    x = 536,213.58

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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.