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Finding the Fourth Proportional to 476,959.20, 715,438.80 and 357,986.40

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Solution

The fourth proportional to 476,959.20, 715,438.80 and 357,986.40 is: 536,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,959.20 : 715,438.80 = 357,986.40 : x
  2. Step 2: Convert to fraction form
    476,959.20/715,438.80 = 357,986.40/x
  3. Step 3: Cross multiply
    476,959.20x = 715,438.80 × 357,986.40
  4. Step 4: Simplify right side
    476,959.20x = 256,117,360,432.32
  5. Step 5: Solve for x
    x = 256,117,360,432.32/476,959.20
  6. Step 6: Final answer
    x = 536,979.60

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Similar ratio
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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.