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Finding the Fourth Proportional to 720,507.22, 994,420.90 and 487,828.60

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Solution

The fourth proportional to 720,507.22, 994,420.90 and 487,828.60 is: 673,285.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,507.22 : 994,420.90 = 487,828.60 : x
  2. Step 2: Convert to fraction form
    720,507.22/994,420.90 = 487,828.60/x
  3. Step 3: Cross multiply
    720,507.22x = 994,420.90 × 487,828.60
  4. Step 4: Simplify right side
    720,507.22x = 485,106,955,457.74
  5. Step 5: Solve for x
    x = 485,106,955,457.74/720,507.22
  6. Step 6: Final answer
    x = 673,285.35

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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.