Home / 645,821.80-968,732.70-442,868.20

Finding the Fourth Proportional to 645,821.80, 968,732.70 and 442,868.20

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Solution

The fourth proportional to 645,821.80, 968,732.70 and 442,868.20 is: 664,302.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,821.80 : 968,732.70 = 442,868.20 : x
  2. Step 2: Convert to fraction form
    645,821.80/968,732.70 = 442,868.20/x
  3. Step 3: Cross multiply
    645,821.80x = 968,732.70 × 442,868.20
  4. Step 4: Simplify right side
    645,821.80x = 429,020,907,130.14
  5. Step 5: Solve for x
    x = 429,020,907,130.14/645,821.80
  6. Step 6: Final answer
    x = 664,302.30

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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.