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Finding the Fourth Proportional to 761,100, 1,050,318 and 421,590.12

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Solution

The fourth proportional to 761,100, 1,050,318 and 421,590.12 is: 581,794.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,100 : 1,050,318 = 421,590.12 : x
  2. Step 2: Convert to fraction form
    761,100/1,050,318 = 421,590.12/x
  3. Step 3: Cross multiply
    761,100x = 1,050,318 × 421,590.12
  4. Step 4: Simplify right side
    761,100x = 442,803,691,658.16
  5. Step 5: Solve for x
    x = 442,803,691,658.16/761,100
  6. Step 6: Final answer
    x = 581,794.37

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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.