Home / 921,538.60-1,382,306.67-428,536.85

Finding the Fourth Proportional to 921,538.60, 1,382,306.67 and 428,536.85

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Solution

The fourth proportional to 921,538.60, 1,382,306.67 and 428,536.85 is: 642,804.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,538.60 : 1,382,306.67 = 428,536.85 : x
  2. Step 2: Convert to fraction form
    921,538.60/1,382,306.67 = 428,536.85/x
  3. Step 3: Cross multiply
    921,538.60x = 1,382,306.67 × 428,536.85
  4. Step 4: Simplify right side
    921,538.60x = 592,369,339,184.26
  5. Step 5: Solve for x
    x = 592,369,339,184.26/921,538.60
  6. Step 6: Final answer
    x = 642,804.70

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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.