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Finding the Fourth Proportional to 637,254.12, 878,962.78 and 419,393.40

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Solution

The fourth proportional to 637,254.12, 878,962.78 and 419,393.40 is: 578,468.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,254.12 : 878,962.78 = 419,393.40 : x
  2. Step 2: Convert to fraction form
    637,254.12/878,962.78 = 419,393.40/x
  3. Step 3: Cross multiply
    637,254.12x = 878,962.78 × 419,393.40
  4. Step 4: Simplify right side
    637,254.12x = 368,631,188,777.65
  5. Step 5: Solve for x
    x = 368,631,188,777.65/637,254.12
  6. Step 6: Final answer
    x = 578,468.11

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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.