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Finding the Fourth Proportional to 456,901.60, 630,911.28 and 287,190.40

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Solution

The fourth proportional to 456,901.60, 630,911.28 and 287,190.40 is: 396,566.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,901.60 : 630,911.28 = 287,190.40 : x
  2. Step 2: Convert to fraction form
    456,901.60/630,911.28 = 287,190.40/x
  3. Step 3: Cross multiply
    456,901.60x = 630,911.28 × 287,190.40
  4. Step 4: Simplify right side
    456,901.60x = 181,191,662,867.71
  5. Step 5: Solve for x
    x = 181,191,662,867.71/456,901.60
  6. Step 6: Final answer
    x = 396,566.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.