Home / 645,623.60-890,596.50-387,434.48

Finding the Fourth Proportional to 645,623.60, 890,596.50 and 387,434.48

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Solution

The fourth proportional to 645,623.60, 890,596.50 and 387,434.48 is: 534,441.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,623.60 : 890,596.50 = 387,434.48 : x
  2. Step 2: Convert to fraction form
    645,623.60/890,596.50 = 387,434.48/x
  3. Step 3: Cross multiply
    645,623.60x = 890,596.50 × 387,434.48
  4. Step 4: Simplify right side
    645,623.60x = 345,047,791,867.32
  5. Step 5: Solve for x
    x = 345,047,791,867.32/645,623.60
  6. Step 6: Final answer
    x = 534,441.11

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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.