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Finding the Fourth Proportional to 266,648.40, 399,389.40 and 207,016.20

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Solution

The fourth proportional to 266,648.40, 399,389.40 and 207,016.20 is: 310,071.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,648.40 : 399,389.40 = 207,016.20 : x
  2. Step 2: Convert to fraction form
    266,648.40/399,389.40 = 207,016.20/x
  3. Step 3: Cross multiply
    266,648.40x = 399,389.40 × 207,016.20
  4. Step 4: Simplify right side
    266,648.40x = 82,680,075,908.28
  5. Step 5: Solve for x
    x = 82,680,075,908.28/266,648.40
  6. Step 6: Final answer
    x = 310,071.52

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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.