Home / 500,316.72-690,424.32-279,555.81

Finding the Fourth Proportional to 500,316.72, 690,424.32 and 279,555.81

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Solution

The fourth proportional to 500,316.72, 690,424.32 and 279,555.81 is: 385,779.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,316.72 : 690,424.32 = 279,555.81 : x
  2. Step 2: Convert to fraction form
    500,316.72/690,424.32 = 279,555.81/x
  3. Step 3: Cross multiply
    500,316.72x = 690,424.32 × 279,555.81
  4. Step 4: Simplify right side
    500,316.72x = 193,012,130,021.30
  5. Step 5: Solve for x
    x = 193,012,130,021.30/500,316.72
  6. Step 6: Final answer
    x = 385,779.89

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1.5x scale

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.