Home / 738,989.40-1,019,804.91-399,457.65

Finding the Fourth Proportional to 738,989.40, 1,019,804.91 and 399,457.65

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Solution

The fourth proportional to 738,989.40, 1,019,804.91 and 399,457.65 is: 551,251.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,989.40 : 1,019,804.91 = 399,457.65 : x
  2. Step 2: Convert to fraction form
    738,989.40/1,019,804.91 = 399,457.65/x
  3. Step 3: Cross multiply
    738,989.40x = 1,019,804.91 × 399,457.65
  4. Step 4: Simplify right side
    738,989.40x = 407,368,872,807.06
  5. Step 5: Solve for x
    x = 407,368,872,807.06/738,989.40
  6. Step 6: Final answer
    x = 551,251.31

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Double scale
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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.