Home / 828,357.10-1,240,911.80-429,259.67

Finding the Fourth Proportional to 828,357.10, 1,240,911.80 and 429,259.67

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Solution

The fourth proportional to 828,357.10, 1,240,911.80 and 429,259.67 is: 643,048.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,357.10 : 1,240,911.80 = 429,259.67 : x
  2. Step 2: Convert to fraction form
    828,357.10/1,240,911.80 = 429,259.67/x
  3. Step 3: Cross multiply
    828,357.10x = 1,240,911.80 × 429,259.67
  4. Step 4: Simplify right side
    828,357.10x = 532,673,387,679.39
  5. Step 5: Solve for x
    x = 532,673,387,679.39/828,357.10
  6. Step 6: Final answer
    x = 643,048.02

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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.