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Finding the Fourth Proportional to 1,385,838, 1,912,457.40 and 749,934

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Solution

The fourth proportional to 1,385,838, 1,912,457.40 and 749,934 is: 1,034,909.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,838 : 1,912,457.40 = 749,934 : x
  2. Step 2: Convert to fraction form
    1,385,838/1,912,457.40 = 749,934/x
  3. Step 3: Cross multiply
    1,385,838x = 1,912,457.40 × 749,934
  4. Step 4: Simplify right side
    1,385,838x = 1,434,216,827,811.60
  5. Step 5: Solve for x
    x = 1,434,216,827,811.60/1,385,838
  6. Step 6: Final answer
    x = 1,034,909.44

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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.