Home / 849,131.52-1,272,647.52-428,527.68

Finding the Fourth Proportional to 849,131.52, 1,272,647.52 and 428,527.68

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Solution

The fourth proportional to 849,131.52, 1,272,647.52 and 428,527.68 is: 642,261.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    849,131.52 : 1,272,647.52 = 428,527.68 : x
  2. Step 2: Convert to fraction form
    849,131.52/1,272,647.52 = 428,527.68/x
  3. Step 3: Cross multiply
    849,131.52x = 1,272,647.52 × 428,527.68
  4. Step 4: Simplify right side
    849,131.52x = 545,364,689,203.35
  5. Step 5: Solve for x
    x = 545,364,689,203.35/849,131.52
  6. Step 6: Final answer
    x = 642,261.74

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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.