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Finding the Fourth Proportional to 723,810.40, 998,891.10 and 401,520.70

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Solution

The fourth proportional to 723,810.40, 998,891.10 and 401,520.70 is: 554,116.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,810.40 : 998,891.10 = 401,520.70 : x
  2. Step 2: Convert to fraction form
    723,810.40/998,891.10 = 401,520.70/x
  3. Step 3: Cross multiply
    723,810.40x = 998,891.10 × 401,520.70
  4. Step 4: Simplify right side
    723,810.40x = 401,075,453,695.77
  5. Step 5: Solve for x
    x = 401,075,453,695.77/723,810.40
  6. Step 6: Final answer
    x = 554,116.73

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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.