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Finding the Fourth Proportional to 430,842.60, 646,955.10 and 291,220.20

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Solution

The fourth proportional to 430,842.60, 646,955.10 and 291,220.20 is: 437,297.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,842.60 : 646,955.10 = 291,220.20 : x
  2. Step 2: Convert to fraction form
    430,842.60/646,955.10 = 291,220.20/x
  3. Step 3: Cross multiply
    430,842.60x = 646,955.10 × 291,220.20
  4. Step 4: Simplify right side
    430,842.60x = 188,406,393,613.02
  5. Step 5: Solve for x
    x = 188,406,393,613.02/430,842.60
  6. Step 6: Final answer
    x = 437,297.50

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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.