Home / 645,526.85-890,809.16-351,166.80

Finding the Fourth Proportional to 645,526.85, 890,809.16 and 351,166.80

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Solution

The fourth proportional to 645,526.85, 890,809.16 and 351,166.80 is: 484,600.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,526.85 : 890,809.16 = 351,166.80 : x
  2. Step 2: Convert to fraction form
    645,526.85/890,809.16 = 351,166.80/x
  3. Step 3: Cross multiply
    645,526.85x = 890,809.16 × 351,166.80
  4. Step 4: Simplify right side
    645,526.85x = 312,822,603,712.59
  5. Step 5: Solve for x
    x = 312,822,603,712.59/645,526.85
  6. Step 6: Final answer
    x = 484,600.46

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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.