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Finding the Fourth Proportional to 800,875.80, 1,201,313.70 and 421,277.40

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Solution

The fourth proportional to 800,875.80, 1,201,313.70 and 421,277.40 is: 631,916.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,875.80 : 1,201,313.70 = 421,277.40 : x
  2. Step 2: Convert to fraction form
    800,875.80/1,201,313.70 = 421,277.40/x
  3. Step 3: Cross multiply
    800,875.80x = 1,201,313.70 × 421,277.40
  4. Step 4: Simplify right side
    800,875.80x = 506,086,312,120.38
  5. Step 5: Solve for x
    x = 506,086,312,120.38/800,875.80
  6. Step 6: Final answer
    x = 631,916.10

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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.