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Finding the Fourth Proportional to 579,434.10, 870,135.30 and 429,843.30

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Solution

The fourth proportional to 579,434.10, 870,135.30 and 429,843.30 is: 645,495.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,434.10 : 870,135.30 = 429,843.30 : x
  2. Step 2: Convert to fraction form
    579,434.10/870,135.30 = 429,843.30/x
  3. Step 3: Cross multiply
    579,434.10x = 870,135.30 × 429,843.30
  4. Step 4: Simplify right side
    579,434.10x = 374,021,828,798.49
  5. Step 5: Solve for x
    x = 374,021,828,798.49/579,434.10
  6. Step 6: Final answer
    x = 645,495.02

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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.