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Finding the Fourth Proportional to 570,426.40, 787,197.76 and 312,299.04

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Solution

The fourth proportional to 570,426.40, 787,197.76 and 312,299.04 is: 430,977.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,426.40 : 787,197.76 = 312,299.04 : x
  2. Step 2: Convert to fraction form
    570,426.40/787,197.76 = 312,299.04/x
  3. Step 3: Cross multiply
    570,426.40x = 787,197.76 × 312,299.04
  4. Step 4: Simplify right side
    570,426.40x = 245,841,104,738.15
  5. Step 5: Solve for x
    x = 245,841,104,738.15/570,426.40
  6. Step 6: Final answer
    x = 430,977.78

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1.5x scale

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.