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Finding the Fourth Proportional to 978,037.10, 1,467,055.65 and 417,128.30

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Solution

The fourth proportional to 978,037.10, 1,467,055.65 and 417,128.30 is: 625,692.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,037.10 : 1,467,055.65 = 417,128.30 : x
  2. Step 2: Convert to fraction form
    978,037.10/1,467,055.65 = 417,128.30/x
  3. Step 3: Cross multiply
    978,037.10x = 1,467,055.65 × 417,128.30
  4. Step 4: Simplify right side
    978,037.10x = 611,950,429,289.90
  5. Step 5: Solve for x
    x = 611,950,429,289.90/978,037.10
  6. Step 6: Final answer
    x = 625,692.45

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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.