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Finding the Fourth Proportional to 287,485.80, 432,006.30 and 253,271.40

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Solution

The fourth proportional to 287,485.80, 432,006.30 and 253,271.40 is: 380,592.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,485.80 : 432,006.30 = 253,271.40 : x
  2. Step 2: Convert to fraction form
    287,485.80/432,006.30 = 253,271.40/x
  3. Step 3: Cross multiply
    287,485.80x = 432,006.30 × 253,271.40
  4. Step 4: Simplify right side
    287,485.80x = 109,414,840,409.82
  5. Step 5: Solve for x
    x = 109,414,840,409.82/287,485.80
  6. Step 6: Final answer
    x = 380,592.16

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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.