Home / 645,189.12-890,410.86-387,075.74

Finding the Fourth Proportional to 645,189.12, 890,410.86 and 387,075.74

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Solution

The fourth proportional to 645,189.12, 890,410.86 and 387,075.74 is: 534,194.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,189.12 : 890,410.86 = 387,075.74 : x
  2. Step 2: Convert to fraction form
    645,189.12/890,410.86 = 387,075.74/x
  3. Step 3: Cross multiply
    645,189.12x = 890,410.86 × 387,075.74
  4. Step 4: Simplify right side
    645,189.12x = 344,656,438,086.48
  5. Step 5: Solve for x
    x = 344,656,438,086.48/645,189.12
  6. Step 6: Final answer
    x = 534,194.44

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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.