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Finding the Fourth Proportional to 978,890.20, 1,468,335.30 and 558,986.20

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Solution

The fourth proportional to 978,890.20, 1,468,335.30 and 558,986.20 is: 838,479.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,890.20 : 1,468,335.30 = 558,986.20 : x
  2. Step 2: Convert to fraction form
    978,890.20/1,468,335.30 = 558,986.20/x
  3. Step 3: Cross multiply
    978,890.20x = 1,468,335.30 × 558,986.20
  4. Step 4: Simplify right side
    978,890.20x = 820,779,169,672.86
  5. Step 5: Solve for x
    x = 820,779,169,672.86/978,890.20
  6. Step 6: Final answer
    x = 838,479.30

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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.