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Finding the Fourth Proportional to 978,649.68, 1,467,622.32 and 338,779.60

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Solution

The fourth proportional to 978,649.68, 1,467,622.32 and 338,779.60 is: 508,047.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,649.68 : 1,467,622.32 = 338,779.60 : x
  2. Step 2: Convert to fraction form
    978,649.68/1,467,622.32 = 338,779.60/x
  3. Step 3: Cross multiply
    978,649.68x = 1,467,622.32 × 338,779.60
  4. Step 4: Simplify right side
    978,649.68x = 497,200,502,520.67
  5. Step 5: Solve for x
    x = 497,200,502,520.67/978,649.68
  6. Step 6: Final answer
    x = 508,047.48

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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.