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Finding the Fourth Proportional to 261,655.68, 392,480.64 and 64,663.68

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Solution

The fourth proportional to 261,655.68, 392,480.64 and 64,663.68 is: 96,994.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,655.68 : 392,480.64 = 64,663.68 : x
  2. Step 2: Convert to fraction form
    261,655.68/392,480.64 = 64,663.68/x
  3. Step 3: Cross multiply
    261,655.68x = 392,480.64 × 64,663.68
  4. Step 4: Simplify right side
    261,655.68x = 25,379,242,511.16
  5. Step 5: Solve for x
    x = 25,379,242,511.16/261,655.68
  6. Step 6: Final answer
    x = 96,994.81

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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.