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Finding the Fourth Proportional to 659,386.50, 988,999.53 and 280,459.59

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Solution

The fourth proportional to 659,386.50, 988,999.53 and 280,459.59 is: 420,655.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,386.50 : 988,999.53 = 280,459.59 : x
  2. Step 2: Convert to fraction form
    659,386.50/988,999.53 = 280,459.59/x
  3. Step 3: Cross multiply
    659,386.50x = 988,999.53 × 280,459.59
  4. Step 4: Simplify right side
    659,386.50x = 277,374,402,693.99
  5. Step 5: Solve for x
    x = 277,374,402,693.99/659,386.50
  6. Step 6: Final answer
    x = 420,655.26

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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.