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Finding the Fourth Proportional to 670,103.40, 1,005,203.70 and 403,289.40

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Solution

The fourth proportional to 670,103.40, 1,005,203.70 and 403,289.40 is: 604,963.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,103.40 : 1,005,203.70 = 403,289.40 : x
  2. Step 2: Convert to fraction form
    670,103.40/1,005,203.70 = 403,289.40/x
  3. Step 3: Cross multiply
    670,103.40x = 1,005,203.70 × 403,289.40
  4. Step 4: Simplify right side
    670,103.40x = 405,387,997,050.78
  5. Step 5: Solve for x
    x = 405,387,997,050.78/670,103.40
  6. Step 6: Final answer
    x = 604,963.35

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1.5x scale

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.