Home / 643,950.18-888,470.10-402,477.84

Finding the Fourth Proportional to 643,950.18, 888,470.10 and 402,477.84

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Solution

The fourth proportional to 643,950.18, 888,470.10 and 402,477.84 is: 555,306.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,950.18 : 888,470.10 = 402,477.84 : x
  2. Step 2: Convert to fraction form
    643,950.18/888,470.10 = 402,477.84/x
  3. Step 3: Cross multiply
    643,950.18x = 888,470.10 × 402,477.84
  4. Step 4: Simplify right side
    643,950.18x = 357,589,526,752.58
  5. Step 5: Solve for x
    x = 357,589,526,752.58/643,950.18
  6. Step 6: Final answer
    x = 555,306.20

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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.