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Finding the Fourth Proportional to 478,676.89, 660,565.55 and 260,887.53

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Solution

The fourth proportional to 478,676.89, 660,565.55 and 260,887.53 is: 360,020.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,676.89 : 660,565.55 = 260,887.53 : x
  2. Step 2: Convert to fraction form
    478,676.89/660,565.55 = 260,887.53/x
  3. Step 3: Cross multiply
    478,676.89x = 660,565.55 × 260,887.53
  4. Step 4: Simplify right side
    478,676.89x = 172,333,315,394.81
  5. Step 5: Solve for x
    x = 172,333,315,394.81/478,676.89
  6. Step 6: Final answer
    x = 360,020.13

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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.