Home / 828,666.80-1,243,000.20-429,429.95

Finding the Fourth Proportional to 828,666.80, 1,243,000.20 and 429,429.95

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Solution

The fourth proportional to 828,666.80, 1,243,000.20 and 429,429.95 is: 644,144.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,666.80 : 1,243,000.20 = 429,429.95 : x
  2. Step 2: Convert to fraction form
    828,666.80/1,243,000.20 = 429,429.95/x
  3. Step 3: Cross multiply
    828,666.80x = 1,243,000.20 × 429,429.95
  4. Step 4: Simplify right side
    828,666.80x = 533,781,513,735.99
  5. Step 5: Solve for x
    x = 533,781,513,735.99/828,666.80
  6. Step 6: Final answer
    x = 644,144.93

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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.