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Finding the Fourth Proportional to 285,510.40, 427,804.80 and 180,140.80

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Solution

The fourth proportional to 285,510.40, 427,804.80 and 180,140.80 is: 269,920.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,510.40 : 427,804.80 = 180,140.80 : x
  2. Step 2: Convert to fraction form
    285,510.40/427,804.80 = 180,140.80/x
  3. Step 3: Cross multiply
    285,510.40x = 427,804.80 × 180,140.80
  4. Step 4: Simplify right side
    285,510.40x = 77,065,098,915.84
  5. Step 5: Solve for x
    x = 77,065,098,915.84/285,510.40
  6. Step 6: Final answer
    x = 269,920.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.