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Finding the Fourth Proportional to 709,801.20, 1,064,701.80 and 211,165.20

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Solution

The fourth proportional to 709,801.20, 1,064,701.80 and 211,165.20 is: 316,747.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,801.20 : 1,064,701.80 = 211,165.20 : x
  2. Step 2: Convert to fraction form
    709,801.20/1,064,701.80 = 211,165.20/x
  3. Step 3: Cross multiply
    709,801.20x = 1,064,701.80 × 211,165.20
  4. Step 4: Simplify right side
    709,801.20x = 224,827,968,537.36
  5. Step 5: Solve for x
    x = 224,827,968,537.36/709,801.20
  6. Step 6: Final answer
    x = 316,747.80

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Similar ratio
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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.