Home / 725,120.16-1,000,643.40-402,821.88

Finding the Fourth Proportional to 725,120.16, 1,000,643.40 and 402,821.88

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Solution

The fourth proportional to 725,120.16, 1,000,643.40 and 402,821.88 is: 555,881.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,120.16 : 1,000,643.40 = 402,821.88 : x
  2. Step 2: Convert to fraction form
    725,120.16/1,000,643.40 = 402,821.88/x
  3. Step 3: Cross multiply
    725,120.16x = 1,000,643.40 × 402,821.88
  4. Step 4: Simplify right side
    725,120.16x = 403,081,055,597.59
  5. Step 5: Solve for x
    x = 403,081,055,597.59/725,120.16
  6. Step 6: Final answer
    x = 555,881.74

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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.