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Finding the Fourth Proportional to 319,373.66, 478,978.74 and 94,681.58

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Solution

The fourth proportional to 319,373.66, 478,978.74 and 94,681.58 is: 141,998.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,373.66 : 478,978.74 = 94,681.58 : x
  2. Step 2: Convert to fraction form
    319,373.66/478,978.74 = 94,681.58/x
  3. Step 3: Cross multiply
    319,373.66x = 478,978.74 × 94,681.58
  4. Step 4: Simplify right side
    319,373.66x = 45,350,463,889.61
  5. Step 5: Solve for x
    x = 45,350,463,889.61/319,373.66
  6. Step 6: Final answer
    x = 141,998.13

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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.