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Finding the Fourth Proportional to 720,291.65, 993,975.77 and 397,995.08

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Solution

The fourth proportional to 720,291.65, 993,975.77 and 397,995.08 is: 549,218.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,291.65 : 993,975.77 = 397,995.08 : x
  2. Step 2: Convert to fraction form
    720,291.65/993,975.77 = 397,995.08/x
  3. Step 3: Cross multiply
    720,291.65x = 993,975.77 × 397,995.08
  4. Step 4: Simplify right side
    720,291.65x = 395,597,462,124.32
  5. Step 5: Solve for x
    x = 395,597,462,124.32/720,291.65
  6. Step 6: Final answer
    x = 549,218.45

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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.