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Finding the Fourth Proportional to 1,315,713.32, 1,815,671.46 and 742,741.16

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Solution

The fourth proportional to 1,315,713.32, 1,815,671.46 and 742,741.16 is: 1,024,975.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,713.32 : 1,815,671.46 = 742,741.16 : x
  2. Step 2: Convert to fraction form
    1,315,713.32/1,815,671.46 = 742,741.16/x
  3. Step 3: Cross multiply
    1,315,713.32x = 1,815,671.46 × 742,741.16
  4. Step 4: Simplify right side
    1,315,713.32x = 1,348,573,926,379.29
  5. Step 5: Solve for x
    x = 1,348,573,926,379.29/1,315,713.32
  6. Step 6: Final answer
    x = 1,024,975.51

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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.