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Finding the Fourth Proportional to 402,031.02, 554,810.49 and 220,761.51

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Solution

The fourth proportional to 402,031.02, 554,810.49 and 220,761.51 is: 304,655.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,031.02 : 554,810.49 = 220,761.51 : x
  2. Step 2: Convert to fraction form
    402,031.02/554,810.49 = 220,761.51/x
  3. Step 3: Cross multiply
    402,031.02x = 554,810.49 × 220,761.51
  4. Step 4: Simplify right side
    402,031.02x = 122,480,801,536.24
  5. Step 5: Solve for x
    x = 122,480,801,536.24/402,031.02
  6. Step 6: Final answer
    x = 304,655.10

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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.