Home / 849,136.02-1,272,654.27-428,532.18

Finding the Fourth Proportional to 849,136.02, 1,272,654.27 and 428,532.18

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Solution

The fourth proportional to 849,136.02, 1,272,654.27 and 428,532.18 is: 642,268.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    849,136.02 : 1,272,654.27 = 428,532.18 : x
  2. Step 2: Convert to fraction form
    849,136.02/1,272,654.27 = 428,532.18/x
  3. Step 3: Cross multiply
    849,136.02x = 1,272,654.27 × 428,532.18
  4. Step 4: Simplify right side
    849,136.02x = 545,373,308,709.41
  5. Step 5: Solve for x
    x = 545,373,308,709.41/849,136.02
  6. Step 6: Final answer
    x = 642,268.49

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.