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Finding the Fourth Proportional to 572,707.32, 790,314.39 and 318,074.82

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Solution

The fourth proportional to 572,707.32, 790,314.39 and 318,074.82 is: 438,931.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,707.32 : 790,314.39 = 318,074.82 : x
  2. Step 2: Convert to fraction form
    572,707.32/790,314.39 = 318,074.82/x
  3. Step 3: Cross multiply
    572,707.32x = 790,314.39 × 318,074.82
  4. Step 4: Simplify right side
    572,707.32x = 251,379,107,342.66
  5. Step 5: Solve for x
    x = 251,379,107,342.66/572,707.32
  6. Step 6: Final answer
    x = 438,931.19

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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.