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Finding the Fourth Proportional to 853,969.84, 1,178,436 and 471,986.80

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Solution

The fourth proportional to 853,969.84, 1,178,436 and 471,986.80 is: 651,318.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,969.84 : 1,178,436 = 471,986.80 : x
  2. Step 2: Convert to fraction form
    853,969.84/1,178,436 = 471,986.80/x
  3. Step 3: Cross multiply
    853,969.84x = 1,178,436 × 471,986.80
  4. Step 4: Simplify right side
    853,969.84x = 556,206,236,644.80
  5. Step 5: Solve for x
    x = 556,206,236,644.80/853,969.84
  6. Step 6: Final answer
    x = 651,318.36

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Double scale
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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.