Home / 628,771.02-868,280.47-399,402.21

Finding the Fourth Proportional to 628,771.02, 868,280.47 and 399,402.21

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Solution

The fourth proportional to 628,771.02, 868,280.47 and 399,402.21 is: 551,541.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,771.02 : 868,280.47 = 399,402.21 : x
  2. Step 2: Convert to fraction form
    628,771.02/868,280.47 = 399,402.21/x
  3. Step 3: Cross multiply
    628,771.02x = 868,280.47 × 399,402.21
  4. Step 4: Simplify right side
    628,771.02x = 346,793,136,620.83
  5. Step 5: Solve for x
    x = 346,793,136,620.83/628,771.02
  6. Step 6: Final answer
    x = 551,541.22

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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.