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Finding the Fourth Proportional to 705,878.80, 1,058,818.20 and 200,438.80

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Solution

The fourth proportional to 705,878.80, 1,058,818.20 and 200,438.80 is: 300,658.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,878.80 : 1,058,818.20 = 200,438.80 : x
  2. Step 2: Convert to fraction form
    705,878.80/1,058,818.20 = 200,438.80/x
  3. Step 3: Cross multiply
    705,878.80x = 1,058,818.20 × 200,438.80
  4. Step 4: Simplify right side
    705,878.80x = 212,228,249,426.16
  5. Step 5: Solve for x
    x = 212,228,249,426.16/705,878.80
  6. Step 6: Final answer
    x = 300,658.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.