Home / 781,391.50-1,078,326.78-423,695.50

Finding the Fourth Proportional to 781,391.50, 1,078,326.78 and 423,695.50

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Solution

The fourth proportional to 781,391.50, 1,078,326.78 and 423,695.50 is: 584,703.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,391.50 : 1,078,326.78 = 423,695.50 : x
  2. Step 2: Convert to fraction form
    781,391.50/1,078,326.78 = 423,695.50/x
  3. Step 3: Cross multiply
    781,391.50x = 1,078,326.78 × 423,695.50
  4. Step 4: Simplify right side
    781,391.50x = 456,882,204,215.49
  5. Step 5: Solve for x
    x = 456,882,204,215.49/781,391.50
  6. Step 6: Final answer
    x = 584,703.32

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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.