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Finding the Fourth Proportional to 641,859.34, 885,779.70 and 351,483.16

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Solution

The fourth proportional to 641,859.34, 885,779.70 and 351,483.16 is: 485,054.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,859.34 : 885,779.70 = 351,483.16 : x
  2. Step 2: Convert to fraction form
    641,859.34/885,779.70 = 351,483.16/x
  3. Step 3: Cross multiply
    641,859.34x = 885,779.70 × 351,483.16
  4. Step 4: Simplify right side
    641,859.34x = 311,336,648,019.85
  5. Step 5: Solve for x
    x = 311,336,648,019.85/641,859.34
  6. Step 6: Final answer
    x = 485,054.32

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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.