Home / 678,236.36-935,931.26-402,605.78

Finding the Fourth Proportional to 678,236.36, 935,931.26 and 402,605.78

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Solution

The fourth proportional to 678,236.36, 935,931.26 and 402,605.78 is: 555,575.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,236.36 : 935,931.26 = 402,605.78 : x
  2. Step 2: Convert to fraction form
    678,236.36/935,931.26 = 402,605.78/x
  3. Step 3: Cross multiply
    678,236.36x = 935,931.26 × 402,605.78
  4. Step 4: Simplify right side
    678,236.36x = 376,811,338,305.03
  5. Step 5: Solve for x
    x = 376,811,338,305.03/678,236.36
  6. Step 6: Final answer
    x = 555,575.25

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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.