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Finding the Fourth Proportional to 1,742,823.62, 2,405,322.12 and 978,877.16

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Solution

The fourth proportional to 1,742,823.62, 2,405,322.12 and 978,877.16 is: 1,350,977.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,742,823.62 : 2,405,322.12 = 978,877.16 : x
  2. Step 2: Convert to fraction form
    1,742,823.62/2,405,322.12 = 978,877.16/x
  3. Step 3: Cross multiply
    1,742,823.62x = 2,405,322.12 × 978,877.16
  4. Step 4: Simplify right side
    1,742,823.62x = 2,354,514,885,710.78
  5. Step 5: Solve for x
    x = 2,354,514,885,710.78/1,742,823.62
  6. Step 6: Final answer
    x = 1,350,977.15

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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.