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Finding the Fourth Proportional to 458,309.62, 687,490.69 and 121,341.50

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Solution

The fourth proportional to 458,309.62, 687,490.69 and 121,341.50 is: 182,019.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,309.62 : 687,490.69 = 121,341.50 : x
  2. Step 2: Convert to fraction form
    458,309.62/687,490.69 = 121,341.50/x
  3. Step 3: Cross multiply
    458,309.62x = 687,490.69 × 121,341.50
  4. Step 4: Simplify right side
    458,309.62x = 83,421,153,284.09
  5. Step 5: Solve for x
    x = 83,421,153,284.09/458,309.62
  6. Step 6: Final answer
    x = 182,019.21

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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.