Home / 765,561.96-1,056,466.80-421,390.53

Finding the Fourth Proportional to 765,561.96, 1,056,466.80 and 421,390.53

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Solution

The fourth proportional to 765,561.96, 1,056,466.80 and 421,390.53 is: 581,514.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,561.96 : 1,056,466.80 = 421,390.53 : x
  2. Step 2: Convert to fraction form
    765,561.96/1,056,466.80 = 421,390.53/x
  3. Step 3: Cross multiply
    765,561.96x = 1,056,466.80 × 421,390.53
  4. Step 4: Simplify right side
    765,561.96x = 445,185,104,779.40
  5. Step 5: Solve for x
    x = 445,185,104,779.40/765,561.96
  6. Step 6: Final answer
    x = 581,514.14

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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.