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Finding the Fourth Proportional to 356,315.80, 534,689.70 and 145,931.80

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Solution

The fourth proportional to 356,315.80, 534,689.70 and 145,931.80 is: 218,986.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,315.80 : 534,689.70 = 145,931.80 : x
  2. Step 2: Convert to fraction form
    356,315.80/534,689.70 = 145,931.80/x
  3. Step 3: Cross multiply
    356,315.80x = 534,689.70 × 145,931.80
  4. Step 4: Simplify right side
    356,315.80x = 78,028,230,362.46
  5. Step 5: Solve for x
    x = 78,028,230,362.46/356,315.80
  6. Step 6: Final answer
    x = 218,986.16

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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.