Home / 645,190.62-890,412.93-387,077.24

Finding the Fourth Proportional to 645,190.62, 890,412.93 and 387,077.24

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Solution

The fourth proportional to 645,190.62, 890,412.93 and 387,077.24 is: 534,196.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,190.62 : 890,412.93 = 387,077.24 : x
  2. Step 2: Convert to fraction form
    645,190.62/890,412.93 = 387,077.24/x
  3. Step 3: Cross multiply
    645,190.62x = 890,412.93 × 387,077.24
  4. Step 4: Simplify right side
    645,190.62x = 344,658,574,952.65
  5. Step 5: Solve for x
    x = 344,658,574,952.65/645,190.62
  6. Step 6: Final answer
    x = 534,196.51

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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.