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Finding the Fourth Proportional to 572,785, 790,443.36 and 318,159.88

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Solution

The fourth proportional to 572,785, 790,443.36 and 318,159.88 is: 439,060.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,785 : 790,443.36 = 318,159.88 : x
  2. Step 2: Convert to fraction form
    572,785/790,443.36 = 318,159.88/x
  3. Step 3: Cross multiply
    572,785x = 790,443.36 × 318,159.88
  4. Step 4: Simplify right side
    572,785x = 251,487,364,564.40
  5. Step 5: Solve for x
    x = 251,487,364,564.40/572,785
  6. Step 6: Final answer
    x = 439,060.67

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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.