Home / 819,270-1,130,129.55-512,814.40

Finding the Fourth Proportional to 819,270, 1,130,129.55 and 512,814.40

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Solution

The fourth proportional to 819,270, 1,130,129.55 and 512,814.40 is: 707,394.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,270 : 1,130,129.55 = 512,814.40 : x
  2. Step 2: Convert to fraction form
    819,270/1,130,129.55 = 512,814.40/x
  3. Step 3: Cross multiply
    819,270x = 1,130,129.55 × 512,814.40
  4. Step 4: Simplify right side
    819,270x = 579,546,704,280.20
  5. Step 5: Solve for x
    x = 579,546,704,280.20/819,270
  6. Step 6: Final answer
    x = 707,394.03

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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.