Home / 278,090.40-417,135.60-208,106.40

Finding the Fourth Proportional to 278,090.40, 417,135.60 and 208,106.40

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Solution

The fourth proportional to 278,090.40, 417,135.60 and 208,106.40 is: 312,159.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,090.40 : 417,135.60 = 208,106.40 : x
  2. Step 2: Convert to fraction form
    278,090.40/417,135.60 = 208,106.40/x
  3. Step 3: Cross multiply
    278,090.40x = 417,135.60 × 208,106.40
  4. Step 4: Simplify right side
    278,090.40x = 86,808,588,027.84
  5. Step 5: Solve for x
    x = 86,808,588,027.84/278,090.40
  6. Step 6: Final answer
    x = 312,159.60

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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.