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Finding the Fourth Proportional to 659,459.21, 988,672.04 and 260,398.67

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Solution

The fourth proportional to 659,459.21, 988,672.04 and 260,398.67 is: 390,393.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,459.21 : 988,672.04 = 260,398.67 : x
  2. Step 2: Convert to fraction form
    659,459.21/988,672.04 = 260,398.67/x
  3. Step 3: Cross multiply
    659,459.21x = 988,672.04 × 260,398.67
  4. Step 4: Simplify right side
    659,459.21x = 257,448,878,036.83
  5. Step 5: Solve for x
    x = 257,448,878,036.83/659,459.21
  6. Step 6: Final answer
    x = 390,393.94

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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.