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Finding the Fourth Proportional to 1,283,641.56, 1,925,865.18 and 771,895.71

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Solution

The fourth proportional to 1,283,641.56, 1,925,865.18 and 771,895.71 is: 1,158,085.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283,641.56 : 1,925,865.18 = 771,895.71 : x
  2. Step 2: Convert to fraction form
    1,283,641.56/1,925,865.18 = 771,895.71/x
  3. Step 3: Cross multiply
    1,283,641.56x = 1,925,865.18 × 771,895.71
  4. Step 4: Simplify right side
    1,283,641.56x = 1,486,567,070,480.38
  5. Step 5: Solve for x
    x = 1,486,567,070,480.38/1,283,641.56
  6. Step 6: Final answer
    x = 1,158,085.81

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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.