Home / 643,839.84-888,485.28-357,342.72

Finding the Fourth Proportional to 643,839.84, 888,485.28 and 357,342.72

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Solution

The fourth proportional to 643,839.84, 888,485.28 and 357,342.72 is: 493,125.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,839.84 : 888,485.28 = 357,342.72 : x
  2. Step 2: Convert to fraction form
    643,839.84/888,485.28 = 357,342.72/x
  3. Step 3: Cross multiply
    643,839.84x = 888,485.28 × 357,342.72
  4. Step 4: Simplify right side
    643,839.84x = 317,493,746,635.16
  5. Step 5: Solve for x
    x = 317,493,746,635.16/643,839.84
  6. Step 6: Final answer
    x = 493,125.35

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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.