Home / 819,271.38-1,130,131.45-512,815.78

Finding the Fourth Proportional to 819,271.38, 1,130,131.45 and 512,815.78

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Solution

The fourth proportional to 819,271.38, 1,130,131.45 and 512,815.78 is: 707,395.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,271.38 : 1,130,131.45 = 512,815.78 : x
  2. Step 2: Convert to fraction form
    819,271.38/1,130,131.45 = 512,815.78/x
  3. Step 3: Cross multiply
    819,271.38x = 1,130,131.45 × 512,815.78
  4. Step 4: Simplify right side
    819,271.38x = 579,549,232,819.55
  5. Step 5: Solve for x
    x = 579,549,232,819.55/819,271.38
  6. Step 6: Final answer
    x = 707,395.93

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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.