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Finding the Fourth Proportional to 439,649.76, 606,740.16 and 278,445.60

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Solution

The fourth proportional to 439,649.76, 606,740.16 and 278,445.60 is: 384,269.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,649.76 : 606,740.16 = 278,445.60 : x
  2. Step 2: Convert to fraction form
    439,649.76/606,740.16 = 278,445.60/x
  3. Step 3: Cross multiply
    439,649.76x = 606,740.16 × 278,445.60
  4. Step 4: Simplify right side
    439,649.76x = 168,944,127,895.30
  5. Step 5: Solve for x
    x = 168,944,127,895.30/439,649.76
  6. Step 6: Final answer
    x = 384,269.81

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1.5x scale

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.