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Finding the Fourth Proportional to 720,644.72, 991,621.24 and 698,730.98

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Solution

The fourth proportional to 720,644.72, 991,621.24 and 698,730.98 is: 961,467.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,644.72 : 991,621.24 = 698,730.98 : x
  2. Step 2: Convert to fraction form
    720,644.72/991,621.24 = 698,730.98/x
  3. Step 3: Cross multiply
    720,644.72x = 991,621.24 × 698,730.98
  4. Step 4: Simplify right side
    720,644.72x = 692,876,474,109.08
  5. Step 5: Solve for x
    x = 692,876,474,109.08/720,644.72
  6. Step 6: Final answer
    x = 961,467.50

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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.