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Finding the Fourth Proportional to 287,277.60, 430,916.40 and 259,721.40

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Solution

The fourth proportional to 287,277.60, 430,916.40 and 259,721.40 is: 389,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,277.60 : 430,916.40 = 259,721.40 : x
  2. Step 2: Convert to fraction form
    287,277.60/430,916.40 = 259,721.40/x
  3. Step 3: Cross multiply
    287,277.60x = 430,916.40 × 259,721.40
  4. Step 4: Simplify right side
    287,277.60x = 111,918,210,690.96
  5. Step 5: Solve for x
    x = 111,918,210,690.96/287,277.60
  6. Step 6: Final answer
    x = 389,582.10

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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.