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Finding the Fourth Proportional to 402,920.56, 602,890.08 and 243,089.20

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Solution

The fourth proportional to 402,920.56, 602,890.08 and 243,089.20 is: 363,734.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,920.56 : 602,890.08 = 243,089.20 : x
  2. Step 2: Convert to fraction form
    402,920.56/602,890.08 = 243,089.20/x
  3. Step 3: Cross multiply
    402,920.56x = 602,890.08 × 243,089.20
  4. Step 4: Simplify right side
    402,920.56x = 146,556,067,235.14
  5. Step 5: Solve for x
    x = 146,556,067,235.14/402,920.56
  6. Step 6: Final answer
    x = 363,734.40

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1.5x scale

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.