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Finding the Fourth Proportional to 659,457.89, 988,670.07 and 260,397.38

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Solution

The fourth proportional to 659,457.89, 988,670.07 and 260,397.38 is: 390,392.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,457.89 : 988,670.07 = 260,397.38 : x
  2. Step 2: Convert to fraction form
    659,457.89/988,670.07 = 260,397.38/x
  3. Step 3: Cross multiply
    659,457.89x = 988,670.07 × 260,397.38
  4. Step 4: Simplify right side
    659,457.89x = 257,447,090,969.07
  5. Step 5: Solve for x
    x = 257,447,090,969.07/659,457.89
  6. Step 6: Final answer
    x = 390,392.01

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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.