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Finding the Fourth Proportional to 1,998,931.80, 2,997,360.90 and 736,109.40

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Solution

The fourth proportional to 1,998,931.80, 2,997,360.90 and 736,109.40 is: 1,103,782.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998,931.80 : 2,997,360.90 = 736,109.40 : x
  2. Step 2: Convert to fraction form
    1,998,931.80/2,997,360.90 = 736,109.40/x
  3. Step 3: Cross multiply
    1,998,931.80x = 2,997,360.90 × 736,109.40
  4. Step 4: Simplify right side
    1,998,931.80x = 2,206,385,533,682.46
  5. Step 5: Solve for x
    x = 2,206,385,533,682.46/1,998,931.80
  6. Step 6: Final answer
    x = 1,103,782.30

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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.