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Finding the Fourth Proportional to 654,690.65, 903,369 and 368,155.40

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Solution

The fourth proportional to 654,690.65, 903,369 and 368,155.40 is: 507,995.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,690.65 : 903,369 = 368,155.40 : x
  2. Step 2: Convert to fraction form
    654,690.65/903,369 = 368,155.40/x
  3. Step 3: Cross multiply
    654,690.65x = 903,369 × 368,155.40
  4. Step 4: Simplify right side
    654,690.65x = 332,580,175,542.60
  5. Step 5: Solve for x
    x = 332,580,175,542.60/654,690.65
  6. Step 6: Final answer
    x = 507,995.91

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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.