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Finding the Fourth Proportional to 667,798.18, 921,559.35 and 361,875.76

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Solution

The fourth proportional to 667,798.18, 921,559.35 and 361,875.76 is: 499,387.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,798.18 : 921,559.35 = 361,875.76 : x
  2. Step 2: Convert to fraction form
    667,798.18/921,559.35 = 361,875.76/x
  3. Step 3: Cross multiply
    667,798.18x = 921,559.35 × 361,875.76
  4. Step 4: Simplify right side
    667,798.18x = 333,489,990,166.36
  5. Step 5: Solve for x
    x = 333,489,990,166.36/667,798.18
  6. Step 6: Final answer
    x = 499,387.39

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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.