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Finding the Fourth Proportional to 710,554.28, 980,553.20 and 388,257.44

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Solution

The fourth proportional to 710,554.28, 980,553.20 and 388,257.44 is: 535,788.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,554.28 : 980,553.20 = 388,257.44 : x
  2. Step 2: Convert to fraction form
    710,554.28/980,553.20 = 388,257.44/x
  3. Step 3: Cross multiply
    710,554.28x = 980,553.20 × 388,257.44
  4. Step 4: Simplify right side
    710,554.28x = 380,707,075,215.81
  5. Step 5: Solve for x
    x = 380,707,075,215.81/710,554.28
  6. Step 6: Final answer
    x = 535,788.87

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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.