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Finding the Fourth Proportional to 526,478.40, 788,680.80 and 315,489.60

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Solution

The fourth proportional to 526,478.40, 788,680.80 and 315,489.60 is: 472,613.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,478.40 : 788,680.80 = 315,489.60 : x
  2. Step 2: Convert to fraction form
    526,478.40/788,680.80 = 315,489.60/x
  3. Step 3: Cross multiply
    526,478.40x = 788,680.80 × 315,489.60
  4. Step 4: Simplify right side
    526,478.40x = 248,820,590,119.68
  5. Step 5: Solve for x
    x = 248,820,590,119.68/526,478.40
  6. Step 6: Final answer
    x = 472,613.10

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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.