Home / 643,503.30-888,141.15-357,115.38

Finding the Fourth Proportional to 643,503.30, 888,141.15 and 357,115.38

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Solution

The fourth proportional to 643,503.30, 888,141.15 and 357,115.38 is: 492,878.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,503.30 : 888,141.15 = 357,115.38 : x
  2. Step 2: Convert to fraction form
    643,503.30/888,141.15 = 357,115.38/x
  3. Step 3: Cross multiply
    643,503.30x = 888,141.15 × 357,115.38
  4. Step 4: Simplify right side
    643,503.30x = 317,168,864,275.89
  5. Step 5: Solve for x
    x = 317,168,864,275.89/643,503.30
  6. Step 6: Final answer
    x = 492,878.38

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Double scale
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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.