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Finding the Fourth Proportional to 761,308.12, 1,050,559.68 and 421,751.80

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Solution

The fourth proportional to 761,308.12, 1,050,559.68 and 421,751.80 is: 581,992.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,308.12 : 1,050,559.68 = 421,751.80 : x
  2. Step 2: Convert to fraction form
    761,308.12/1,050,559.68 = 421,751.80/x
  3. Step 3: Cross multiply
    761,308.12x = 1,050,559.68 × 421,751.80
  4. Step 4: Simplify right side
    761,308.12x = 443,075,436,047.42
  5. Step 5: Solve for x
    x = 443,075,436,047.42/761,308.12
  6. Step 6: Final answer
    x = 581,992.26

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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.