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Finding the Fourth Proportional to 628,689.32, 943,024.76 and 155,374.72

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Solution

The fourth proportional to 628,689.32, 943,024.76 and 155,374.72 is: 233,059.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,689.32 : 943,024.76 = 155,374.72 : x
  2. Step 2: Convert to fraction form
    628,689.32/943,024.76 = 155,374.72/x
  3. Step 3: Cross multiply
    628,689.32x = 943,024.76 × 155,374.72
  4. Step 4: Simplify right side
    628,689.32x = 146,522,208,038.07
  5. Step 5: Solve for x
    x = 146,522,208,038.07/628,689.32
  6. Step 6: Final answer
    x = 233,059.80

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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.