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Finding the Fourth Proportional to 570,412.09, 787,168.91 and 312,305.77

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Solution

The fourth proportional to 570,412.09, 787,168.91 and 312,305.77 is: 430,982.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,412.09 : 787,168.91 = 312,305.77 : x
  2. Step 2: Convert to fraction form
    570,412.09/787,168.91 = 312,305.77/x
  3. Step 3: Cross multiply
    570,412.09x = 787,168.91 × 312,305.77
  4. Step 4: Simplify right side
    570,412.09x = 245,837,392,557.61
  5. Step 5: Solve for x
    x = 245,837,392,557.61/570,412.09
  6. Step 6: Final answer
    x = 430,982.09

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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.