Home / 851,877.60-1,276,066.80-431,390.40

Finding the Fourth Proportional to 851,877.60, 1,276,066.80 and 431,390.40

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Solution

The fourth proportional to 851,877.60, 1,276,066.80 and 431,390.40 is: 646,199.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,877.60 : 1,276,066.80 = 431,390.40 : x
  2. Step 2: Convert to fraction form
    851,877.60/1,276,066.80 = 431,390.40/x
  3. Step 3: Cross multiply
    851,877.60x = 1,276,066.80 × 431,390.40
  4. Step 4: Simplify right side
    851,877.60x = 550,482,967,278.72
  5. Step 5: Solve for x
    x = 550,482,967,278.72/851,877.60
  6. Step 6: Final answer
    x = 646,199.60

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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.