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Finding the Fourth Proportional to 667,503.60, 921,155.40 and 361,580.64

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Solution

The fourth proportional to 667,503.60, 921,155.40 and 361,580.64 is: 498,981.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,503.60 : 921,155.40 = 361,580.64 : x
  2. Step 2: Convert to fraction form
    667,503.60/921,155.40 = 361,580.64/x
  3. Step 3: Cross multiply
    667,503.60x = 921,155.40 × 361,580.64
  4. Step 4: Simplify right side
    667,503.60x = 333,071,959,071.46
  5. Step 5: Solve for x
    x = 333,071,959,071.46/667,503.60
  6. Step 6: Final answer
    x = 498,981.52

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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.