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Finding the Fourth Proportional to 286,656.80, 429,875.85 and 86,910.80

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Solution

The fourth proportional to 286,656.80, 429,875.85 and 86,910.80 is: 130,333.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,656.80 : 429,875.85 = 86,910.80 : x
  2. Step 2: Convert to fraction form
    286,656.80/429,875.85 = 86,910.80/x
  3. Step 3: Cross multiply
    286,656.80x = 429,875.85 × 86,910.80
  4. Step 4: Simplify right side
    286,656.80x = 37,360,854,024.18
  5. Step 5: Solve for x
    x = 37,360,854,024.18/286,656.80
  6. Step 6: Final answer
    x = 130,333.05

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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.