Home / 678,272.64-935,981.88-402,642.28

Finding the Fourth Proportional to 678,272.64, 935,981.88 and 402,642.28

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Solution

The fourth proportional to 678,272.64, 935,981.88 and 402,642.28 is: 555,625.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,272.64 : 935,981.88 = 402,642.28 : x
  2. Step 2: Convert to fraction form
    678,272.64/935,981.88 = 402,642.28/x
  3. Step 3: Cross multiply
    678,272.64x = 935,981.88 × 402,642.28
  4. Step 4: Simplify right side
    678,272.64x = 376,865,878,201.89
  5. Step 5: Solve for x
    x = 376,865,878,201.89/678,272.64
  6. Step 6: Final answer
    x = 555,625.95

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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.