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Finding the Fourth Proportional to 287,596.40, 431,394.60 and 147,628.40

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Solution

The fourth proportional to 287,596.40, 431,394.60 and 147,628.40 is: 221,442.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,596.40 : 431,394.60 = 147,628.40 : x
  2. Step 2: Convert to fraction form
    287,596.40/431,394.60 = 147,628.40/x
  3. Step 3: Cross multiply
    287,596.40x = 431,394.60 × 147,628.40
  4. Step 4: Simplify right side
    287,596.40x = 63,686,094,566.64
  5. Step 5: Solve for x
    x = 63,686,094,566.64/287,596.40
  6. Step 6: Final answer
    x = 221,442.60

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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.