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Finding the Fourth Proportional to 478,956.36, 718,437.38 and 141,999.95

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Solution

The fourth proportional to 478,956.36, 718,437.38 and 141,999.95 is: 213,000.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,956.36 : 718,437.38 = 141,999.95 : x
  2. Step 2: Convert to fraction form
    478,956.36/718,437.38 = 141,999.95/x
  3. Step 3: Cross multiply
    478,956.36x = 718,437.38 × 141,999.95
  4. Step 4: Simplify right side
    478,956.36x = 102,018,072,038.13
  5. Step 5: Solve for x
    x = 102,018,072,038.13/478,956.36
  6. Step 6: Final answer
    x = 213,000.77

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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.