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Finding the Fourth Proportional to 667,309.90, 920,888.50 and 361,386.76

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Solution

The fourth proportional to 667,309.90, 920,888.50 and 361,386.76 is: 498,714.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,309.90 : 920,888.50 = 361,386.76 : x
  2. Step 2: Convert to fraction form
    667,309.90/920,888.50 = 361,386.76/x
  3. Step 3: Cross multiply
    667,309.90x = 920,888.50 × 361,386.76
  4. Step 4: Simplify right side
    667,309.90x = 332,796,911,336.26
  5. Step 5: Solve for x
    x = 332,796,911,336.26/667,309.90
  6. Step 6: Final answer
    x = 498,714.18

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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.