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Finding the Fourth Proportional to 392,903.61, 589,767.69 and 348,210.90

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Solution

The fourth proportional to 392,903.61, 589,767.69 and 348,210.90 is: 522,681.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,903.61 : 589,767.69 = 348,210.90 : x
  2. Step 2: Convert to fraction form
    392,903.61/589,767.69 = 348,210.90/x
  3. Step 3: Cross multiply
    392,903.61x = 589,767.69 × 348,210.90
  4. Step 4: Simplify right side
    392,903.61x = 205,363,538,125.82
  5. Step 5: Solve for x
    x = 205,363,538,125.82/392,903.61
  6. Step 6: Final answer
    x = 522,681.73

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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.