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Finding the Fourth Proportional to 630,221.87, 869,779.70 and 358,330.50

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Solution

The fourth proportional to 630,221.87, 869,779.70 and 358,330.50 is: 494,537.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,221.87 : 869,779.70 = 358,330.50 : x
  2. Step 2: Convert to fraction form
    630,221.87/869,779.70 = 358,330.50/x
  3. Step 3: Cross multiply
    630,221.87x = 869,779.70 × 358,330.50
  4. Step 4: Simplify right side
    630,221.87x = 311,668,589,665.75
  5. Step 5: Solve for x
    x = 311,668,589,665.75/630,221.87
  6. Step 6: Final answer
    x = 494,537.89

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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.