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Finding the Fourth Proportional to 642,130.30, 886,735.48 and 480,705.10

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Solution

The fourth proportional to 642,130.30, 886,735.48 and 480,705.10 is: 663,818.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,130.30 : 886,735.48 = 480,705.10 : x
  2. Step 2: Convert to fraction form
    642,130.30/886,735.48 = 480,705.10/x
  3. Step 3: Cross multiply
    642,130.30x = 886,735.48 × 480,705.10
  4. Step 4: Simplify right side
    642,130.30x = 426,258,267,586.95
  5. Step 5: Solve for x
    x = 426,258,267,586.95/642,130.30
  6. Step 6: Final answer
    x = 663,818.96

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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.