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Finding the Fourth Proportional to 978,998.94, 1,351,017.23 and 549,319.05

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Solution

The fourth proportional to 978,998.94, 1,351,017.23 and 549,319.05 is: 758,059.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,998.94 : 1,351,017.23 = 549,319.05 : x
  2. Step 2: Convert to fraction form
    978,998.94/1,351,017.23 = 549,319.05/x
  3. Step 3: Cross multiply
    978,998.94x = 1,351,017.23 × 549,319.05
  4. Step 4: Simplify right side
    978,998.94x = 742,139,498,570.64
  5. Step 5: Solve for x
    x = 742,139,498,570.64/978,998.94
  6. Step 6: Final answer
    x = 758,059.55

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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.