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Finding the Fourth Proportional to 652,047.40, 978,071.10 and 278,108.20

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Solution

The fourth proportional to 652,047.40, 978,071.10 and 278,108.20 is: 417,162.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,047.40 : 978,071.10 = 278,108.20 : x
  2. Step 2: Convert to fraction form
    652,047.40/978,071.10 = 278,108.20/x
  3. Step 3: Cross multiply
    652,047.40x = 978,071.10 × 278,108.20
  4. Step 4: Simplify right side
    652,047.40x = 272,009,593,093.02
  5. Step 5: Solve for x
    x = 272,009,593,093.02/652,047.40
  6. Step 6: Final answer
    x = 417,162.30

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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.