Home / 738,174.98-1,018,681.44-398,643.20

Finding the Fourth Proportional to 738,174.98, 1,018,681.44 and 398,643.20

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Solution

The fourth proportional to 738,174.98, 1,018,681.44 and 398,643.20 is: 550,127.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,174.98 : 1,018,681.44 = 398,643.20 : x
  2. Step 2: Convert to fraction form
    738,174.98/1,018,681.44 = 398,643.20/x
  3. Step 3: Cross multiply
    738,174.98x = 1,018,681.44 × 398,643.20
  4. Step 4: Simplify right side
    738,174.98x = 406,090,429,022.21
  5. Step 5: Solve for x
    x = 406,090,429,022.21/738,174.98
  6. Step 6: Final answer
    x = 550,127.60

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Double scale
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Similar ratio
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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.