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Finding the Fourth Proportional to 800,679.12, 1,103,666.76 and 630,643.92

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Solution

The fourth proportional to 800,679.12, 1,103,666.76 and 630,643.92 is: 869,287.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,679.12 : 1,103,666.76 = 630,643.92 : x
  2. Step 2: Convert to fraction form
    800,679.12/1,103,666.76 = 630,643.92/x
  3. Step 3: Cross multiply
    800,679.12x = 1,103,666.76 × 630,643.92
  4. Step 4: Simplify right side
    800,679.12x = 696,020,731,900.10
  5. Step 5: Solve for x
    x = 696,020,731,900.10/800,679.12
  6. Step 6: Final answer
    x = 869,287.98

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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.