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Finding the Fourth Proportional to 659,842.80, 990,023.40 and 260,415.60

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Solution

The fourth proportional to 659,842.80, 990,023.40 and 260,415.60 is: 390,725.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,842.80 : 990,023.40 = 260,415.60 : x
  2. Step 2: Convert to fraction form
    659,842.80/990,023.40 = 260,415.60/x
  3. Step 3: Cross multiply
    659,842.80x = 990,023.40 × 260,415.60
  4. Step 4: Simplify right side
    659,842.80x = 257,817,537,725.04
  5. Step 5: Solve for x
    x = 257,817,537,725.04/659,842.80
  6. Step 6: Final answer
    x = 390,725.70

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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.