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Finding the Fourth Proportional to 714,805.22, 986,448.39 and 388,132.13

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Solution

The fourth proportional to 714,805.22, 986,448.39 and 388,132.13 is: 535,631.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,805.22 : 986,448.39 = 388,132.13 : x
  2. Step 2: Convert to fraction form
    714,805.22/986,448.39 = 388,132.13/x
  3. Step 3: Cross multiply
    714,805.22x = 986,448.39 × 388,132.13
  4. Step 4: Simplify right side
    714,805.22x = 382,872,314,745.77
  5. Step 5: Solve for x
    x = 382,872,314,745.77/714,805.22
  6. Step 6: Final answer
    x = 535,631.67

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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.