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Finding the Fourth Proportional to 768,145.80, 1,152,218.70 and 368,580.90

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Solution

The fourth proportional to 768,145.80, 1,152,218.70 and 368,580.90 is: 552,871.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,145.80 : 1,152,218.70 = 368,580.90 : x
  2. Step 2: Convert to fraction form
    768,145.80/1,152,218.70 = 368,580.90/x
  3. Step 3: Cross multiply
    768,145.80x = 1,152,218.70 × 368,580.90
  4. Step 4: Simplify right side
    768,145.80x = 424,685,805,442.83
  5. Step 5: Solve for x
    x = 424,685,805,442.83/768,145.80
  6. Step 6: Final answer
    x = 552,871.35

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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.