Home / 690,979.68-1,035,683.28-420,511.14

Finding the Fourth Proportional to 690,979.68, 1,035,683.28 and 420,511.14

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Solution

The fourth proportional to 690,979.68, 1,035,683.28 and 420,511.14 is: 630,288.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,979.68 : 1,035,683.28 = 420,511.14 : x
  2. Step 2: Convert to fraction form
    690,979.68/1,035,683.28 = 420,511.14/x
  3. Step 3: Cross multiply
    690,979.68x = 1,035,683.28 × 420,511.14
  4. Step 4: Simplify right side
    690,979.68x = 435,516,356,751.74
  5. Step 5: Solve for x
    x = 435,516,356,751.74/690,979.68
  6. Step 6: Final answer
    x = 630,288.23

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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.