Home / 738,147.40-1,018,643.48-398,615.66

Finding the Fourth Proportional to 738,147.40, 1,018,643.48 and 398,615.66

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Solution

The fourth proportional to 738,147.40, 1,018,643.48 and 398,615.66 is: 550,089.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,147.40 : 1,018,643.48 = 398,615.66 : x
  2. Step 2: Convert to fraction form
    738,147.40/1,018,643.48 = 398,615.66/x
  3. Step 3: Cross multiply
    738,147.40x = 1,018,643.48 × 398,615.66
  4. Step 4: Simplify right side
    738,147.40x = 406,047,243,084.90
  5. Step 5: Solve for x
    x = 406,047,243,084.90/738,147.40
  6. Step 6: Final answer
    x = 550,089.65

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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.