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Finding the Fourth Proportional to 368,678.39, 508,504.55 and 278,038.18

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Solution

The fourth proportional to 368,678.39, 508,504.55 and 278,038.18 is: 383,487.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,678.39 : 508,504.55 = 278,038.18 : x
  2. Step 2: Convert to fraction form
    368,678.39/508,504.55 = 278,038.18/x
  3. Step 3: Cross multiply
    368,678.39x = 508,504.55 × 278,038.18
  4. Step 4: Simplify right side
    368,678.39x = 141,383,679,027.55
  5. Step 5: Solve for x
    x = 141,383,679,027.55/368,678.39
  6. Step 6: Final answer
    x = 383,487.84

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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.