Home / 717,747.66-990,486.90-395,450.28

Finding the Fourth Proportional to 717,747.66, 990,486.90 and 395,450.28

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Solution

The fourth proportional to 717,747.66, 990,486.90 and 395,450.28 is: 545,718.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,747.66 : 990,486.90 = 395,450.28 : x
  2. Step 2: Convert to fraction form
    717,747.66/990,486.90 = 395,450.28/x
  3. Step 3: Cross multiply
    717,747.66x = 990,486.90 × 395,450.28
  4. Step 4: Simplify right side
    717,747.66x = 391,688,321,941.33
  5. Step 5: Solve for x
    x = 391,688,321,941.33/717,747.66
  6. Step 6: Final answer
    x = 545,718.70

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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.