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Finding the Fourth Proportional to 420,545.95, 580,266.27 and 248,376.60

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Solution

The fourth proportional to 420,545.95, 580,266.27 and 248,376.60 is: 342,708.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,545.95 : 580,266.27 = 248,376.60 : x
  2. Step 2: Convert to fraction form
    420,545.95/580,266.27 = 248,376.60/x
  3. Step 3: Cross multiply
    420,545.95x = 580,266.27 × 248,376.60
  4. Step 4: Simplify right side
    420,545.95x = 144,124,563,237.28
  5. Step 5: Solve for x
    x = 144,124,563,237.28/420,545.95
  6. Step 6: Final answer
    x = 342,708.24

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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.