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Finding the Fourth Proportional to 645,978.60, 968,316.54 and 406,263.81

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Solution

The fourth proportional to 645,978.60, 968,316.54 and 406,263.81 is: 608,986.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,978.60 : 968,316.54 = 406,263.81 : x
  2. Step 2: Convert to fraction form
    645,978.60/968,316.54 = 406,263.81/x
  3. Step 3: Cross multiply
    645,978.60x = 968,316.54 × 406,263.81
  4. Step 4: Simplify right side
    645,978.60x = 393,391,963,049.18
  5. Step 5: Solve for x
    x = 393,391,963,049.18/645,978.60
  6. Step 6: Final answer
    x = 608,986.06

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.