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Finding the Fourth Proportional to 391,303.65, 549,399.75 and 391,303.65

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Solution

The fourth proportional to 391,303.65, 549,399.75 and 391,303.65 is: 549,399.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,303.65 : 549,399.75 = 391,303.65 : x
  2. Step 2: Convert to fraction form
    391,303.65/549,399.75 = 391,303.65/x
  3. Step 3: Cross multiply
    391,303.65x = 549,399.75 × 391,303.65
  4. Step 4: Simplify right side
    391,303.65x = 214,982,127,484.09
  5. Step 5: Solve for x
    x = 214,982,127,484.09/391,303.65
  6. Step 6: Final answer
    x = 549,399.75

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.