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Finding the Fourth Proportional to 776,709.63, 1,071,642.69 and 500,950.80

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Solution

The fourth proportional to 776,709.63, 1,071,642.69 and 500,950.80 is: 691,172.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    776,709.63 : 1,071,642.69 = 500,950.80 : x
  2. Step 2: Convert to fraction form
    776,709.63/1,071,642.69 = 500,950.80/x
  3. Step 3: Cross multiply
    776,709.63x = 1,071,642.69 × 500,950.80
  4. Step 4: Simplify right side
    776,709.63x = 536,840,262,869.65
  5. Step 5: Solve for x
    x = 536,840,262,869.65/776,709.63
  6. Step 6: Final answer
    x = 691,172.40

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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.