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Finding the Fourth Proportional to 643,670.40, 903,004.80 and 643,670.40

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Solution

The fourth proportional to 643,670.40, 903,004.80 and 643,670.40 is: 903,004.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,670.40 : 903,004.80 = 643,670.40 : x
  2. Step 2: Convert to fraction form
    643,670.40/903,004.80 = 643,670.40/x
  3. Step 3: Cross multiply
    643,670.40x = 903,004.80 × 643,670.40
  4. Step 4: Simplify right side
    643,670.40x = 581,237,460,817.92
  5. Step 5: Solve for x
    x = 581,237,460,817.92/643,670.40
  6. Step 6: Final answer
    x = 903,004.80

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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.