Home / 525,785.20-788,677.80-315,660.40

Finding the Fourth Proportional to 525,785.20, 788,677.80 and 315,660.40

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Solution

The fourth proportional to 525,785.20, 788,677.80 and 315,660.40 is: 473,490.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,785.20 : 788,677.80 = 315,660.40 : x
  2. Step 2: Convert to fraction form
    525,785.20/788,677.80 = 315,660.40/x
  3. Step 3: Cross multiply
    525,785.20x = 788,677.80 × 315,660.40
  4. Step 4: Simplify right side
    525,785.20x = 248,954,349,819.12
  5. Step 5: Solve for x
    x = 248,954,349,819.12/525,785.20
  6. Step 6: Final answer
    x = 473,490.60

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Double scale
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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.