Home / 772,403.02-1,065,979.29-428,346.70

Finding the Fourth Proportional to 772,403.02, 1,065,979.29 and 428,346.70

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Solution

The fourth proportional to 772,403.02, 1,065,979.29 and 428,346.70 is: 591,153.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,403.02 : 1,065,979.29 = 428,346.70 : x
  2. Step 2: Convert to fraction form
    772,403.02/1,065,979.29 = 428,346.70/x
  3. Step 3: Cross multiply
    772,403.02x = 1,065,979.29 × 428,346.70
  4. Step 4: Simplify right side
    772,403.02x = 456,608,711,139.84
  5. Step 5: Solve for x
    x = 456,608,711,139.84/772,403.02
  6. Step 6: Final answer
    x = 591,153.45

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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.