Home / 738,991.20-1,019,807.36-399,459.45

Finding the Fourth Proportional to 738,991.20, 1,019,807.36 and 399,459.45

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Solution

The fourth proportional to 738,991.20, 1,019,807.36 and 399,459.45 is: 551,253.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,991.20 : 1,019,807.36 = 399,459.45 : x
  2. Step 2: Convert to fraction form
    738,991.20/1,019,807.36 = 399,459.45/x
  3. Step 3: Cross multiply
    738,991.20x = 1,019,807.36 × 399,459.45
  4. Step 4: Simplify right side
    738,991.20x = 407,371,686,967.05
  5. Step 5: Solve for x
    x = 407,371,686,967.05/738,991.20
  6. Step 6: Final answer
    x = 551,253.77

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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.