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Finding the Fourth Proportional to 717,756.63, 990,548.21 and 395,466.63

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Solution

The fourth proportional to 717,756.63, 990,548.21 and 395,466.63 is: 545,768.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,756.63 : 990,548.21 = 395,466.63 : x
  2. Step 2: Convert to fraction form
    717,756.63/990,548.21 = 395,466.63/x
  3. Step 3: Cross multiply
    717,756.63x = 990,548.21 × 395,466.63
  4. Step 4: Simplify right side
    717,756.63x = 391,728,760,483.90
  5. Step 5: Solve for x
    x = 391,728,760,483.90/717,756.63
  6. Step 6: Final answer
    x = 545,768.22

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Double scale
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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.