Home / 805,428.62-1,111,384.51-499,393.36

Finding the Fourth Proportional to 805,428.62, 1,111,384.51 and 499,393.36

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Solution

The fourth proportional to 805,428.62, 1,111,384.51 and 499,393.36 is: 689,096.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,428.62 : 1,111,384.51 = 499,393.36 : x
  2. Step 2: Convert to fraction form
    805,428.62/1,111,384.51 = 499,393.36/x
  3. Step 3: Cross multiply
    805,428.62x = 1,111,384.51 × 499,393.36
  4. Step 4: Simplify right side
    805,428.62x = 555,018,044,700.85
  5. Step 5: Solve for x
    x = 555,018,044,700.85/805,428.62
  6. Step 6: Final answer
    x = 689,096.50

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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.