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Finding the Fourth Proportional to 312,557.99, 468,864.59 and 87,920.28

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Solution

The fourth proportional to 312,557.99, 468,864.59 and 87,920.28 is: 131,888.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,557.99 : 468,864.59 = 87,920.28 : x
  2. Step 2: Convert to fraction form
    312,557.99/468,864.59 = 87,920.28/x
  3. Step 3: Cross multiply
    312,557.99x = 468,864.59 × 87,920.28
  4. Step 4: Simplify right side
    312,557.99x = 41,222,705,595.28
  5. Step 5: Solve for x
    x = 41,222,705,595.28/312,557.99
  6. Step 6: Final answer
    x = 131,888.19

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1.5x scale

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.