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Finding the Fourth Proportional to 978,007.69, 1,349,649.70 and 548,287.91

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Solution

The fourth proportional to 978,007.69, 1,349,649.70 and 548,287.91 is: 756,636.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,007.69 : 1,349,649.70 = 548,287.91 : x
  2. Step 2: Convert to fraction form
    978,007.69/1,349,649.70 = 548,287.91/x
  3. Step 3: Cross multiply
    978,007.69x = 1,349,649.70 × 548,287.91
  4. Step 4: Simplify right side
    978,007.69x = 739,996,613,245.13
  5. Step 5: Solve for x
    x = 739,996,613,245.13/978,007.69
  6. Step 6: Final answer
    x = 756,636.80

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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.