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Finding the Fourth Proportional to 420,510.78, 580,307.40 and 229,520.07

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Solution

The fourth proportional to 420,510.78, 580,307.40 and 229,520.07 is: 316,739.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,510.78 : 580,307.40 = 229,520.07 : x
  2. Step 2: Convert to fraction form
    420,510.78/580,307.40 = 229,520.07/x
  3. Step 3: Cross multiply
    420,510.78x = 580,307.40 × 229,520.07
  4. Step 4: Simplify right side
    420,510.78x = 133,192,195,069.52
  5. Step 5: Solve for x
    x = 133,192,195,069.52/420,510.78
  6. Step 6: Final answer
    x = 316,739.07

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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.