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Finding the Fourth Proportional to 659,848.80, 990,032.40 and 260,421.60

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Solution

The fourth proportional to 659,848.80, 990,032.40 and 260,421.60 is: 390,734.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,848.80 : 990,032.40 = 260,421.60 : x
  2. Step 2: Convert to fraction form
    659,848.80/990,032.40 = 260,421.60/x
  3. Step 3: Cross multiply
    659,848.80x = 990,032.40 × 260,421.60
  4. Step 4: Simplify right side
    659,848.80x = 257,825,821,659.84
  5. Step 5: Solve for x
    x = 257,825,821,659.84/659,848.80
  6. Step 6: Final answer
    x = 390,734.70

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Similar ratio
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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.