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Finding the Fourth Proportional to 628,478.31, 867,319.59 and 356,557.66

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Solution

The fourth proportional to 628,478.31, 867,319.59 and 356,557.66 is: 492,060.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,478.31 : 867,319.59 = 356,557.66 : x
  2. Step 2: Convert to fraction form
    628,478.31/867,319.59 = 356,557.66/x
  3. Step 3: Cross multiply
    628,478.31x = 867,319.59 × 356,557.66
  4. Step 4: Simplify right side
    628,478.31x = 309,249,443,482.56
  5. Step 5: Solve for x
    x = 309,249,443,482.56/628,478.31
  6. Step 6: Final answer
    x = 492,060.65

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.