Home / 928,148.40-1,280,903.99-520,250.35

Finding the Fourth Proportional to 928,148.40, 1,280,903.99 and 520,250.35

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Solution

The fourth proportional to 928,148.40, 1,280,903.99 and 520,250.35 is: 717,978.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,148.40 : 1,280,903.99 = 520,250.35 : x
  2. Step 2: Convert to fraction form
    928,148.40/1,280,903.99 = 520,250.35/x
  3. Step 3: Cross multiply
    928,148.40x = 1,280,903.99 × 520,250.35
  4. Step 4: Simplify right side
    928,148.40x = 666,390,749,113.90
  5. Step 5: Solve for x
    x = 666,390,749,113.90/928,148.40
  6. Step 6: Final answer
    x = 717,978.66

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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.