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Finding the Fourth Proportional to 307,870.60, 461,805.90 and 286,875.40

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Solution

The fourth proportional to 307,870.60, 461,805.90 and 286,875.40 is: 430,313.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,870.60 : 461,805.90 = 286,875.40 : x
  2. Step 2: Convert to fraction form
    307,870.60/461,805.90 = 286,875.40/x
  3. Step 3: Cross multiply
    307,870.60x = 461,805.90 × 286,875.40
  4. Step 4: Simplify right side
    307,870.60x = 132,480,752,284.86
  5. Step 5: Solve for x
    x = 132,480,752,284.86/307,870.60
  6. Step 6: Final answer
    x = 430,313.10

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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.