Home / 402,128.12-555,152.27-310,046.28

Finding the Fourth Proportional to 402,128.12, 555,152.27 and 310,046.28

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Solution

The fourth proportional to 402,128.12, 555,152.27 and 310,046.28 is: 428,029.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,128.12 : 555,152.27 = 310,046.28 : x
  2. Step 2: Convert to fraction form
    402,128.12/555,152.27 = 310,046.28/x
  3. Step 3: Cross multiply
    402,128.12x = 555,152.27 × 310,046.28
  4. Step 4: Simplify right side
    402,128.12x = 172,122,894,596.82
  5. Step 5: Solve for x
    x = 172,122,894,596.82/402,128.12
  6. Step 6: Final answer
    x = 428,029.99

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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.