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Finding the Fourth Proportional to 286,317.80, 429,476.70 and 260,052.20

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Solution

The fourth proportional to 286,317.80, 429,476.70 and 260,052.20 is: 390,078.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,317.80 : 429,476.70 = 260,052.20 : x
  2. Step 2: Convert to fraction form
    286,317.80/429,476.70 = 260,052.20/x
  3. Step 3: Cross multiply
    286,317.80x = 429,476.70 × 260,052.20
  4. Step 4: Simplify right side
    286,317.80x = 111,686,360,683.74
  5. Step 5: Solve for x
    x = 111,686,360,683.74/286,317.80
  6. Step 6: Final answer
    x = 390,078.30

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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.