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Finding the Fourth Proportional to 485,813.68, 670,420.68 and 268,016.40

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Solution

The fourth proportional to 485,813.68, 670,420.68 and 268,016.40 is: 369,861.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,813.68 : 670,420.68 = 268,016.40 : x
  2. Step 2: Convert to fraction form
    485,813.68/670,420.68 = 268,016.40/x
  3. Step 3: Cross multiply
    485,813.68x = 670,420.68 × 268,016.40
  4. Step 4: Simplify right side
    485,813.68x = 179,683,737,139.15
  5. Step 5: Solve for x
    x = 179,683,737,139.15/485,813.68
  6. Step 6: Final answer
    x = 369,861.42

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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.