Home / 287,766.72-397,089.12-160,430.40

Finding the Fourth Proportional to 287,766.72, 397,089.12 and 160,430.40

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Solution

The fourth proportional to 287,766.72, 397,089.12 and 160,430.40 is: 221,377.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,766.72 : 397,089.12 = 160,430.40 : x
  2. Step 2: Convert to fraction form
    287,766.72/397,089.12 = 160,430.40/x
  3. Step 3: Cross multiply
    287,766.72x = 397,089.12 × 160,430.40
  4. Step 4: Simplify right side
    287,766.72x = 63,705,166,357.25
  5. Step 5: Solve for x
    x = 63,705,166,357.25/287,766.72
  6. Step 6: Final answer
    x = 221,377.81

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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.