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Finding the Fourth Proportional to 1,272,560.55, 1,908,741.60 and 739,741.74

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Solution

The fourth proportional to 1,272,560.55, 1,908,741.60 and 739,741.74 is: 1,109,554.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,560.55 : 1,908,741.60 = 739,741.74 : x
  2. Step 2: Convert to fraction form
    1,272,560.55/1,908,741.60 = 739,741.74/x
  3. Step 3: Cross multiply
    1,272,560.55x = 1,908,741.60 × 739,741.74
  4. Step 4: Simplify right side
    1,272,560.55x = 1,411,975,832,394.38
  5. Step 5: Solve for x
    x = 1,411,975,832,394.38/1,272,560.55
  6. Step 6: Final answer
    x = 1,109,554.93

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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.