Home / 772,307.60-1,065,685.82-428,140.28

Finding the Fourth Proportional to 772,307.60, 1,065,685.82 and 428,140.28

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Solution

The fourth proportional to 772,307.60, 1,065,685.82 and 428,140.28 is: 590,778.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,307.60 : 1,065,685.82 = 428,140.28 : x
  2. Step 2: Convert to fraction form
    772,307.60/1,065,685.82 = 428,140.28/x
  3. Step 3: Cross multiply
    772,307.60x = 1,065,685.82 × 428,140.28
  4. Step 4: Simplify right side
    772,307.60x = 456,263,025,890.34
  5. Step 5: Solve for x
    x = 456,263,025,890.34/772,307.60
  6. Step 6: Final answer
    x = 590,778.89

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Double scale
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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.