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Finding the Fourth Proportional to 647,562.80, 970,307.40 and 425,687.60

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Solution

The fourth proportional to 647,562.80, 970,307.40 and 425,687.60 is: 637,849.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,562.80 : 970,307.40 = 425,687.60 : x
  2. Step 2: Convert to fraction form
    647,562.80/970,307.40 = 425,687.60/x
  3. Step 3: Cross multiply
    647,562.80x = 970,307.40 × 425,687.60
  4. Step 4: Simplify right side
    647,562.80x = 413,047,828,368.24
  5. Step 5: Solve for x
    x = 413,047,828,368.24/647,562.80
  6. Step 6: Final answer
    x = 637,849.84

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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.