Home / 643,470.30-888,095.70-357,082.38

Finding the Fourth Proportional to 643,470.30, 888,095.70 and 357,082.38

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Solution

The fourth proportional to 643,470.30, 888,095.70 and 357,082.38 is: 492,832.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,470.30 : 888,095.70 = 357,082.38 : x
  2. Step 2: Convert to fraction form
    643,470.30/888,095.70 = 357,082.38/x
  3. Step 3: Cross multiply
    643,470.30x = 888,095.70 × 357,082.38
  4. Step 4: Simplify right side
    643,470.30x = 317,123,326,223.77
  5. Step 5: Solve for x
    x = 317,123,326,223.77/643,470.30
  6. Step 6: Final answer
    x = 492,832.89

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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.