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Finding the Fourth Proportional to 286,585.40, 429,881.70 and 86,907.80

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Solution

The fourth proportional to 286,585.40, 429,881.70 and 86,907.80 is: 130,362.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,585.40 : 429,881.70 = 86,907.80 : x
  2. Step 2: Convert to fraction form
    286,585.40/429,881.70 = 86,907.80/x
  3. Step 3: Cross multiply
    286,585.40x = 429,881.70 × 86,907.80
  4. Step 4: Simplify right side
    286,585.40x = 37,360,072,807.26
  5. Step 5: Solve for x
    x = 37,360,072,807.26/286,585.40
  6. Step 6: Final answer
    x = 130,362.79

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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.