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Finding the Fourth Proportional to 761,613.13, 1,051,504.74 and 490,153.88

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Solution

The fourth proportional to 761,613.13, 1,051,504.74 and 490,153.88 is: 676,720.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,613.13 : 1,051,504.74 = 490,153.88 : x
  2. Step 2: Convert to fraction form
    761,613.13/1,051,504.74 = 490,153.88/x
  3. Step 3: Cross multiply
    761,613.13x = 1,051,504.74 × 490,153.88
  4. Step 4: Simplify right side
    761,613.13x = 515,399,130,778.15
  5. Step 5: Solve for x
    x = 515,399,130,778.15/761,613.13
  6. Step 6: Final answer
    x = 676,720.38

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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.