Home / 687,778.61-1,030,213.53-434,928.60

Finding the Fourth Proportional to 687,778.61, 1,030,213.53 and 434,928.60

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Solution

The fourth proportional to 687,778.61, 1,030,213.53 and 434,928.60 is: 651,473.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,778.61 : 1,030,213.53 = 434,928.60 : x
  2. Step 2: Convert to fraction form
    687,778.61/1,030,213.53 = 434,928.60/x
  3. Step 3: Cross multiply
    687,778.61x = 1,030,213.53 × 434,928.60
  4. Step 4: Simplify right side
    687,778.61x = 448,069,328,303.96
  5. Step 5: Solve for x
    x = 448,069,328,303.96/687,778.61
  6. Step 6: Final answer
    x = 651,473.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.