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Finding the Fourth Proportional to 978,998.40, 1,468,497.60 and 558,316.80

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Solution

The fourth proportional to 978,998.40, 1,468,497.60 and 558,316.80 is: 837,475.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,998.40 : 1,468,497.60 = 558,316.80 : x
  2. Step 2: Convert to fraction form
    978,998.40/1,468,497.60 = 558,316.80/x
  3. Step 3: Cross multiply
    978,998.40x = 1,468,497.60 × 558,316.80
  4. Step 4: Simplify right side
    978,998.40x = 819,886,880,839.68
  5. Step 5: Solve for x
    x = 819,886,880,839.68/978,998.40
  6. Step 6: Final answer
    x = 837,475.20

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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.