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Finding the Fourth Proportional to 690,879, 1,035,873.18 and 291,412.92

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Solution

The fourth proportional to 690,879, 1,035,873.18 and 291,412.92 is: 436,931.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,879 : 1,035,873.18 = 291,412.92 : x
  2. Step 2: Convert to fraction form
    690,879/1,035,873.18 = 291,412.92/x
  3. Step 3: Cross multiply
    690,879x = 1,035,873.18 × 291,412.92
  4. Step 4: Simplify right side
    690,879x = 301,866,828,133.49
  5. Step 5: Solve for x
    x = 301,866,828,133.49/690,879
  6. Step 6: Final answer
    x = 436,931.54

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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.