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Finding the Fourth Proportional to 652,139.80, 978,501.30 and 315,050.20

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Solution

The fourth proportional to 652,139.80, 978,501.30 and 315,050.20 is: 472,716.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,139.80 : 978,501.30 = 315,050.20 : x
  2. Step 2: Convert to fraction form
    652,139.80/978,501.30 = 315,050.20/x
  3. Step 3: Cross multiply
    652,139.80x = 978,501.30 × 315,050.20
  4. Step 4: Simplify right side
    652,139.80x = 308,277,030,265.26
  5. Step 5: Solve for x
    x = 308,277,030,265.26/652,139.80
  6. Step 6: Final answer
    x = 472,716.17

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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.