Home / 675,212.80-1,011,458.40-421,715.20

Finding the Fourth Proportional to 675,212.80, 1,011,458.40 and 421,715.20

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Solution

The fourth proportional to 675,212.80, 1,011,458.40 and 421,715.20 is: 631,722.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,212.80 : 1,011,458.40 = 421,715.20 : x
  2. Step 2: Convert to fraction form
    675,212.80/1,011,458.40 = 421,715.20/x
  3. Step 3: Cross multiply
    675,212.80x = 1,011,458.40 × 421,715.20
  4. Step 4: Simplify right side
    675,212.80x = 426,547,381,447.68
  5. Step 5: Solve for x
    x = 426,547,381,447.68/675,212.80
  6. Step 6: Final answer
    x = 631,722.89

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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.