Home / 459,721.60-689,971.20-207,390.40

Finding the Fourth Proportional to 459,721.60, 689,971.20 and 207,390.40

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Solution

The fourth proportional to 459,721.60, 689,971.20 and 207,390.40 is: 311,261.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,721.60 : 689,971.20 = 207,390.40 : x
  2. Step 2: Convert to fraction form
    459,721.60/689,971.20 = 207,390.40/x
  3. Step 3: Cross multiply
    459,721.60x = 689,971.20 × 207,390.40
  4. Step 4: Simplify right side
    459,721.60x = 143,093,403,156.48
  5. Step 5: Solve for x
    x = 143,093,403,156.48/459,721.60
  6. Step 6: Final answer
    x = 311,261.00

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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.