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Finding the Fourth Proportional to 648,004.70, 908,139.70 and 648,004.70

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Solution

The fourth proportional to 648,004.70, 908,139.70 and 648,004.70 is: 908,139.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,004.70 : 908,139.70 = 648,004.70 : x
  2. Step 2: Convert to fraction form
    648,004.70/908,139.70 = 648,004.70/x
  3. Step 3: Cross multiply
    648,004.70x = 908,139.70 × 648,004.70
  4. Step 4: Simplify right side
    648,004.70x = 588,478,793,856.59
  5. Step 5: Solve for x
    x = 588,478,793,856.59/648,004.70
  6. Step 6: Final answer
    x = 908,139.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.