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Finding the Fourth Proportional to 489,225.95, 675,123.68 and 285,395.39

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Solution

The fourth proportional to 489,225.95, 675,123.68 and 285,395.39 is: 393,840.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,225.95 : 675,123.68 = 285,395.39 : x
  2. Step 2: Convert to fraction form
    489,225.95/675,123.68 = 285,395.39/x
  3. Step 3: Cross multiply
    489,225.95x = 675,123.68 × 285,395.39
  4. Step 4: Simplify right side
    489,225.95x = 192,677,183,289.71
  5. Step 5: Solve for x
    x = 192,677,183,289.71/489,225.95
  6. Step 6: Final answer
    x = 393,840.89

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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.