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Finding the Fourth Proportional to 397,389.87, 549,842.13 and 346,508.70

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Solution

The fourth proportional to 397,389.87, 549,842.13 and 346,508.70 is: 479,441.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,389.87 : 549,842.13 = 346,508.70 : x
  2. Step 2: Convert to fraction form
    397,389.87/549,842.13 = 346,508.70/x
  3. Step 3: Cross multiply
    397,389.87x = 549,842.13 × 346,508.70
  4. Step 4: Simplify right side
    397,389.87x = 190,525,081,671.53
  5. Step 5: Solve for x
    x = 190,525,081,671.53/397,389.87
  6. Step 6: Final answer
    x = 479,441.21

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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.