Home / 645,430.88-890,716.56-355,055.24

Finding the Fourth Proportional to 645,430.88, 890,716.56 and 355,055.24

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Solution

The fourth proportional to 645,430.88, 890,716.56 and 355,055.24 is: 489,988.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,430.88 : 890,716.56 = 355,055.24 : x
  2. Step 2: Convert to fraction form
    645,430.88/890,716.56 = 355,055.24/x
  3. Step 3: Cross multiply
    645,430.88x = 890,716.56 × 355,055.24
  4. Step 4: Simplify right side
    645,430.88x = 316,253,581,982.77
  5. Step 5: Solve for x
    x = 316,253,581,982.77/645,430.88
  6. Step 6: Final answer
    x = 489,988.30

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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.