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Finding the Fourth Proportional to 458,779.51, 688,169.16 and 143,263.45

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Solution

The fourth proportional to 458,779.51, 688,169.16 and 143,263.45 is: 214,895.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,779.51 : 688,169.16 = 143,263.45 : x
  2. Step 2: Convert to fraction form
    458,779.51/688,169.16 = 143,263.45/x
  3. Step 3: Cross multiply
    458,779.51x = 688,169.16 × 143,263.45
  4. Step 4: Simplify right side
    458,779.51x = 98,589,488,045.20
  5. Step 5: Solve for x
    x = 98,589,488,045.20/458,779.51
  6. Step 6: Final answer
    x = 214,895.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.