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Finding the Fourth Proportional to 873,807.40, 1,308,086.70 and 518,638.60

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Solution

The fourth proportional to 873,807.40, 1,308,086.70 and 518,638.60 is: 776,400.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,807.40 : 1,308,086.70 = 518,638.60 : x
  2. Step 2: Convert to fraction form
    873,807.40/1,308,086.70 = 518,638.60/x
  3. Step 3: Cross multiply
    873,807.40x = 1,308,086.70 × 518,638.60
  4. Step 4: Simplify right side
    873,807.40x = 678,424,254,766.62
  5. Step 5: Solve for x
    x = 678,424,254,766.62/873,807.40
  6. Step 6: Final answer
    x = 776,400.22

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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.