Home / 430,904.98-646,356.78-430,281.69

Finding the Fourth Proportional to 430,904.98, 646,356.78 and 430,281.69

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Solution

The fourth proportional to 430,904.98, 646,356.78 and 430,281.69 is: 645,421.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,904.98 : 646,356.78 = 430,281.69 : x
  2. Step 2: Convert to fraction form
    430,904.98/646,356.78 = 430,281.69/x
  3. Step 3: Cross multiply
    430,904.98x = 646,356.78 × 430,281.69
  4. Step 4: Simplify right side
    430,904.98x = 278,115,485,217.52
  5. Step 5: Solve for x
    x = 278,115,485,217.52/430,904.98
  6. Step 6: Final answer
    x = 645,421.84

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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.