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Finding the Fourth Proportional to 716,609.76, 988,415.64 and 487,032.30

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Solution

The fourth proportional to 716,609.76, 988,415.64 and 487,032.30 is: 671,760.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,609.76 : 988,415.64 = 487,032.30 : x
  2. Step 2: Convert to fraction form
    716,609.76/988,415.64 = 487,032.30/x
  3. Step 3: Cross multiply
    716,609.76x = 988,415.64 × 487,032.30
  4. Step 4: Simplify right side
    716,609.76x = 481,390,342,505.17
  5. Step 5: Solve for x
    x = 481,390,342,505.17/716,609.76
  6. Step 6: Final answer
    x = 671,760.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.