Home / 645,582.60-890,539.92-387,390.96

Finding the Fourth Proportional to 645,582.60, 890,539.92 and 387,390.96

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Solution

The fourth proportional to 645,582.60, 890,539.92 and 387,390.96 is: 534,381.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,582.60 : 890,539.92 = 387,390.96 : x
  2. Step 2: Convert to fraction form
    645,582.60/890,539.92 = 387,390.96/x
  3. Step 3: Cross multiply
    645,582.60x = 890,539.92 × 387,390.96
  4. Step 4: Simplify right side
    645,582.60x = 344,987,114,527.12
  5. Step 5: Solve for x
    x = 344,987,114,527.12/645,582.60
  6. Step 6: Final answer
    x = 534,381.06

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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.