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Finding the Fourth Proportional to 453,312.80, 679,969.20 and 425,319.20

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Solution

The fourth proportional to 453,312.80, 679,969.20 and 425,319.20 is: 637,978.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,312.80 : 679,969.20 = 425,319.20 : x
  2. Step 2: Convert to fraction form
    453,312.80/679,969.20 = 425,319.20/x
  3. Step 3: Cross multiply
    453,312.80x = 679,969.20 × 425,319.20
  4. Step 4: Simplify right side
    453,312.80x = 289,203,956,168.64
  5. Step 5: Solve for x
    x = 289,203,956,168.64/453,312.80
  6. Step 6: Final answer
    x = 637,978.80

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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.