Home / 709,452.80-1,064,230.40-428,364.80

Finding the Fourth Proportional to 709,452.80, 1,064,230.40 and 428,364.80

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Solution

The fourth proportional to 709,452.80, 1,064,230.40 and 428,364.80 is: 642,578.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,452.80 : 1,064,230.40 = 428,364.80 : x
  2. Step 2: Convert to fraction form
    709,452.80/1,064,230.40 = 428,364.80/x
  3. Step 3: Cross multiply
    709,452.80x = 1,064,230.40 × 428,364.80
  4. Step 4: Simplify right side
    709,452.80x = 455,878,842,449.92
  5. Step 5: Solve for x
    x = 455,878,842,449.92/709,452.80
  6. Step 6: Final answer
    x = 642,578.11

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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.