Home / 520,020.90-779,642.55-220,256.10

Finding the Fourth Proportional to 520,020.90, 779,642.55 and 220,256.10

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Solution

The fourth proportional to 520,020.90, 779,642.55 and 220,256.10 is: 330,219.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,020.90 : 779,642.55 = 220,256.10 : x
  2. Step 2: Convert to fraction form
    520,020.90/779,642.55 = 220,256.10/x
  3. Step 3: Cross multiply
    520,020.90x = 779,642.55 × 220,256.10
  4. Step 4: Simplify right side
    520,020.90x = 171,721,027,457.06
  5. Step 5: Solve for x
    x = 171,721,027,457.06/520,020.90
  6. Step 6: Final answer
    x = 330,219.47

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1.5x scale

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.