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Finding the Fourth Proportional to 688,084.80, 949,603.68 and 518,049.60

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Solution

The fourth proportional to 688,084.80, 949,603.68 and 518,049.60 is: 714,943.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,084.80 : 949,603.68 = 518,049.60 : x
  2. Step 2: Convert to fraction form
    688,084.80/949,603.68 = 518,049.60/x
  3. Step 3: Cross multiply
    688,084.80x = 949,603.68 × 518,049.60
  4. Step 4: Simplify right side
    688,084.80x = 491,941,806,582.53
  5. Step 5: Solve for x
    x = 491,941,806,582.53/688,084.80
  6. Step 6: Final answer
    x = 714,943.57

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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.