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Finding the Fourth Proportional to 553,235.67, 763,456.59 and 311,517.50

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Solution

The fourth proportional to 553,235.67, 763,456.59 and 311,517.50 is: 429,889.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,235.67 : 763,456.59 = 311,517.50 : x
  2. Step 2: Convert to fraction form
    553,235.67/763,456.59 = 311,517.50/x
  3. Step 3: Cross multiply
    553,235.67x = 763,456.59 × 311,517.50
  4. Step 4: Simplify right side
    553,235.67x = 237,830,084,458.04
  5. Step 5: Solve for x
    x = 237,830,084,458.04/553,235.67
  6. Step 6: Final answer
    x = 429,889.28

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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.