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Finding the Fourth Proportional to 808,638.60, 1,212,957.90 and 740,404.20

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Solution

The fourth proportional to 808,638.60, 1,212,957.90 and 740,404.20 is: 1,110,606.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,638.60 : 1,212,957.90 = 740,404.20 : x
  2. Step 2: Convert to fraction form
    808,638.60/1,212,957.90 = 740,404.20/x
  3. Step 3: Cross multiply
    808,638.60x = 1,212,957.90 × 740,404.20
  4. Step 4: Simplify right side
    808,638.60x = 898,079,123,583.18
  5. Step 5: Solve for x
    x = 898,079,123,583.18/808,638.60
  6. Step 6: Final answer
    x = 1,110,606.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.