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Finding the Fourth Proportional to 673,794.90, 929,916.45 and 387,327.06

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Solution

The fourth proportional to 673,794.90, 929,916.45 and 387,327.06 is: 534,557.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,794.90 : 929,916.45 = 387,327.06 : x
  2. Step 2: Convert to fraction form
    673,794.90/929,916.45 = 387,327.06/x
  3. Step 3: Cross multiply
    673,794.90x = 929,916.45 × 387,327.06
  4. Step 4: Simplify right side
    673,794.90x = 360,181,804,624.14
  5. Step 5: Solve for x
    x = 360,181,804,624.14/673,794.90
  6. Step 6: Final answer
    x = 534,557.04

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.