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Finding the Fourth Proportional to 557,119.12, 768,871.98 and 315,444.28

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Solution

The fourth proportional to 557,119.12, 768,871.98 and 315,444.28 is: 435,340.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,119.12 : 768,871.98 = 315,444.28 : x
  2. Step 2: Convert to fraction form
    557,119.12/768,871.98 = 315,444.28/x
  3. Step 3: Cross multiply
    557,119.12x = 768,871.98 × 315,444.28
  4. Step 4: Simplify right side
    557,119.12x = 242,536,268,143.27
  5. Step 5: Solve for x
    x = 242,536,268,143.27/557,119.12
  6. Step 6: Final answer
    x = 435,340.05

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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.