Home / 287,715.10-397,070.49-158,678.82

Finding the Fourth Proportional to 287,715.10, 397,070.49 and 158,678.82

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Solution

The fourth proportional to 287,715.10, 397,070.49 and 158,678.82 is: 218,989.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,715.10 : 397,070.49 = 158,678.82 : x
  2. Step 2: Convert to fraction form
    287,715.10/397,070.49 = 158,678.82/x
  3. Step 3: Cross multiply
    287,715.10x = 397,070.49 × 158,678.82
  4. Step 4: Simplify right side
    287,715.10x = 63,006,676,512.50
  5. Step 5: Solve for x
    x = 63,006,676,512.50/287,715.10
  6. Step 6: Final answer
    x = 218,989.81

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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.