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Finding the Fourth Proportional to 652,123.60, 978,185.40 and 368,688.40

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Solution

The fourth proportional to 652,123.60, 978,185.40 and 368,688.40 is: 553,032.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,123.60 : 978,185.40 = 368,688.40 : x
  2. Step 2: Convert to fraction form
    652,123.60/978,185.40 = 368,688.40/x
  3. Step 3: Cross multiply
    652,123.60x = 978,185.40 × 368,688.40
  4. Step 4: Simplify right side
    652,123.60x = 360,645,610,029.36
  5. Step 5: Solve for x
    x = 360,645,610,029.36/652,123.60
  6. Step 6: Final answer
    x = 553,032.60

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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.