Home / 420,075.87-579,535.34-243,149.91

Finding the Fourth Proportional to 420,075.87, 579,535.34 and 243,149.91

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Solution

The fourth proportional to 420,075.87, 579,535.34 and 243,149.91 is: 335,448.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,075.87 : 579,535.34 = 243,149.91 : x
  2. Step 2: Convert to fraction form
    420,075.87/579,535.34 = 243,149.91/x
  3. Step 3: Cross multiply
    420,075.87x = 579,535.34 × 243,149.91
  4. Step 4: Simplify right side
    420,075.87x = 140,913,964,547.07
  5. Step 5: Solve for x
    x = 140,913,964,547.07/420,075.87
  6. Step 6: Final answer
    x = 335,448.84

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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.