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Finding the Fourth Proportional to 775,808.40, 1,070,602.68 and 431,640.72

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Solution

The fourth proportional to 775,808.40, 1,070,602.68 and 431,640.72 is: 595,657.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    775,808.40 : 1,070,602.68 = 431,640.72 : x
  2. Step 2: Convert to fraction form
    775,808.40/1,070,602.68 = 431,640.72/x
  3. Step 3: Cross multiply
    775,808.40x = 1,070,602.68 × 431,640.72
  4. Step 4: Simplify right side
    775,808.40x = 462,115,711,629.13
  5. Step 5: Solve for x
    x = 462,115,711,629.13/775,808.40
  6. Step 6: Final answer
    x = 595,657.01

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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.