Home / 669,699.40-1,005,326.70-385,616.20

Finding the Fourth Proportional to 669,699.40, 1,005,326.70 and 385,616.20

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Solution

The fourth proportional to 669,699.40, 1,005,326.70 and 385,616.20 is: 578,872.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,699.40 : 1,005,326.70 = 385,616.20 : x
  2. Step 2: Convert to fraction form
    669,699.40/1,005,326.70 = 385,616.20/x
  3. Step 3: Cross multiply
    669,699.40x = 1,005,326.70 × 385,616.20
  4. Step 4: Simplify right side
    669,699.40x = 387,670,261,812.54
  5. Step 5: Solve for x
    x = 387,670,261,812.54/669,699.40
  6. Step 6: Final answer
    x = 578,872.05

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1.5x scale

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.