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Finding the Fourth Proportional to 710,692.44, 980,727.66 and 388,406.40

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Solution

The fourth proportional to 710,692.44, 980,727.66 and 388,406.40 is: 535,985.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,692.44 : 980,727.66 = 388,406.40 : x
  2. Step 2: Convert to fraction form
    710,692.44/980,727.66 = 388,406.40/x
  3. Step 3: Cross multiply
    710,692.44x = 980,727.66 × 388,406.40
  4. Step 4: Simplify right side
    710,692.44x = 380,920,899,801.02
  5. Step 5: Solve for x
    x = 380,920,899,801.02/710,692.44
  6. Step 6: Final answer
    x = 535,985.58

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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.