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Finding the Fourth Proportional to 618,390.32, 928,638.65 and 402,616.34

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Solution

The fourth proportional to 618,390.32, 928,638.65 and 402,616.34 is: 604,610.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,390.32 : 928,638.65 = 402,616.34 : x
  2. Step 2: Convert to fraction form
    618,390.32/928,638.65 = 402,616.34/x
  3. Step 3: Cross multiply
    618,390.32x = 928,638.65 × 402,616.34
  4. Step 4: Simplify right side
    618,390.32x = 373,885,097,773.68
  5. Step 5: Solve for x
    x = 373,885,097,773.68/618,390.32
  6. Step 6: Final answer
    x = 604,610.21

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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.