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Finding the Fourth Proportional to 478,506.79, 660,368.77 and 263,646.80

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Solution

The fourth proportional to 478,506.79, 660,368.77 and 263,646.80 is: 363,848.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,506.79 : 660,368.77 = 263,646.80 : x
  2. Step 2: Convert to fraction form
    478,506.79/660,368.77 = 263,646.80/x
  3. Step 3: Cross multiply
    478,506.79x = 660,368.77 × 263,646.80
  4. Step 4: Simplify right side
    478,506.79x = 174,104,111,545.86
  5. Step 5: Solve for x
    x = 174,104,111,545.86/478,506.79
  6. Step 6: Final answer
    x = 363,848.78

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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.