Home / 557,748.08-769,629.76-315,978.88

Finding the Fourth Proportional to 557,748.08, 769,629.76 and 315,978.88

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Solution

The fourth proportional to 557,748.08, 769,629.76 and 315,978.88 is: 436,015.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,748.08 : 769,629.76 = 315,978.88 : x
  2. Step 2: Convert to fraction form
    557,748.08/769,629.76 = 315,978.88/x
  3. Step 3: Cross multiply
    557,748.08x = 769,629.76 × 315,978.88
  4. Step 4: Simplify right side
    557,748.08x = 243,186,748,050.37
  5. Step 5: Solve for x
    x = 243,186,748,050.37/557,748.08
  6. Step 6: Final answer
    x = 436,015.39

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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.