Home / 1,320,090.40-1,979,746.80-521,106.40

Finding the Fourth Proportional to 1,320,090.40, 1,979,746.80 and 521,106.40

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Solution

The fourth proportional to 1,320,090.40, 1,979,746.80 and 521,106.40 is: 781,506.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,090.40 : 1,979,746.80 = 521,106.40 : x
  2. Step 2: Convert to fraction form
    1,320,090.40/1,979,746.80 = 521,106.40/x
  3. Step 3: Cross multiply
    1,320,090.40x = 1,979,746.80 × 521,106.40
  4. Step 4: Simplify right side
    1,320,090.40x = 1,031,658,727,859.52
  5. Step 5: Solve for x
    x = 1,031,658,727,859.52/1,320,090.40
  6. Step 6: Final answer
    x = 781,506.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.