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Finding the Fourth Proportional to 1,386,784.04, 1,913,725.32 and 774,941.84

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Solution

The fourth proportional to 1,386,784.04, 1,913,725.32 and 774,941.84 is: 1,069,399.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,784.04 : 1,913,725.32 = 774,941.84 : x
  2. Step 2: Convert to fraction form
    1,386,784.04/1,913,725.32 = 774,941.84/x
  3. Step 3: Cross multiply
    1,386,784.04x = 1,913,725.32 × 774,941.84
  4. Step 4: Simplify right side
    1,386,784.04x = 1,483,025,811,166.76
  5. Step 5: Solve for x
    x = 1,483,025,811,166.76/1,386,784.04
  6. Step 6: Final answer
    x = 1,069,399.25

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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.