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Finding the Fourth Proportional to 478,877.40, 660,847.32 and 261,085.32

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Solution

The fourth proportional to 478,877.40, 660,847.32 and 261,085.32 is: 360,295.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,877.40 : 660,847.32 = 261,085.32 : x
  2. Step 2: Convert to fraction form
    478,877.40/660,847.32 = 261,085.32/x
  3. Step 3: Cross multiply
    478,877.40x = 660,847.32 × 261,085.32
  4. Step 4: Simplify right side
    478,877.40x = 172,537,534,013.34
  5. Step 5: Solve for x
    x = 172,537,534,013.34/478,877.40
  6. Step 6: Final answer
    x = 360,295.84

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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.