Home / 849,143.34-1,274,021.19-428,102.10

Finding the Fourth Proportional to 849,143.34, 1,274,021.19 and 428,102.10

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Solution

The fourth proportional to 849,143.34, 1,274,021.19 and 428,102.10 is: 642,307.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    849,143.34 : 1,274,021.19 = 428,102.10 : x
  2. Step 2: Convert to fraction form
    849,143.34/1,274,021.19 = 428,102.10/x
  3. Step 3: Cross multiply
    849,143.34x = 1,274,021.19 × 428,102.10
  4. Step 4: Simplify right side
    849,143.34x = 545,411,146,883.50
  5. Step 5: Solve for x
    x = 545,411,146,883.50/849,143.34
  6. Step 6: Final answer
    x = 642,307.51

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Double scale
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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.