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Finding the Fourth Proportional to 478,893.77, 660,988.55 and 287,870.25

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Solution

The fourth proportional to 478,893.77, 660,988.55 and 287,870.25 is: 397,330.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,893.77 : 660,988.55 = 287,870.25 : x
  2. Step 2: Convert to fraction form
    478,893.77/660,988.55 = 287,870.25/x
  3. Step 3: Cross multiply
    478,893.77x = 660,988.55 × 287,870.25
  4. Step 4: Simplify right side
    478,893.77x = 190,278,939,855.31
  5. Step 5: Solve for x
    x = 190,278,939,855.31/478,893.77
  6. Step 6: Final answer
    x = 397,330.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.