Home / 817,220.67-1,225,017.64-390,257.38

Finding the Fourth Proportional to 817,220.67, 1,225,017.64 and 390,257.38

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Solution

The fourth proportional to 817,220.67, 1,225,017.64 and 390,257.38 is: 584,997.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,220.67 : 1,225,017.64 = 390,257.38 : x
  2. Step 2: Convert to fraction form
    817,220.67/1,225,017.64 = 390,257.38/x
  3. Step 3: Cross multiply
    817,220.67x = 1,225,017.64 × 390,257.38
  4. Step 4: Simplify right side
    817,220.67x = 478,072,174,640.18
  5. Step 5: Solve for x
    x = 478,072,174,640.18/817,220.67
  6. Step 6: Final answer
    x = 584,997.65

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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.