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Finding the Fourth Proportional to 652,005.80, 978,008.70 and 628,386.20

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Solution

The fourth proportional to 652,005.80, 978,008.70 and 628,386.20 is: 942,579.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,005.80 : 978,008.70 = 628,386.20 : x
  2. Step 2: Convert to fraction form
    652,005.80/978,008.70 = 628,386.20/x
  3. Step 3: Cross multiply
    652,005.80x = 978,008.70 × 628,386.20
  4. Step 4: Simplify right side
    652,005.80x = 614,567,170,559.94
  5. Step 5: Solve for x
    x = 614,567,170,559.94/652,005.80
  6. Step 6: Final answer
    x = 942,579.30

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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.