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Finding the Fourth Proportional to 425,639.40, 637,940.70 and 188,730.60

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Solution

The fourth proportional to 425,639.40, 637,940.70 and 188,730.60 is: 282,866.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,639.40 : 637,940.70 = 188,730.60 : x
  2. Step 2: Convert to fraction form
    425,639.40/637,940.70 = 188,730.60/x
  3. Step 3: Cross multiply
    425,639.40x = 637,940.70 × 188,730.60
  4. Step 4: Simplify right side
    425,639.40x = 120,398,931,075.42
  5. Step 5: Solve for x
    x = 120,398,931,075.42/425,639.40
  6. Step 6: Final answer
    x = 282,866.04

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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.