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Finding the Fourth Proportional to 615,878.80, 860,130.80 and 615,878.80

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Solution

The fourth proportional to 615,878.80, 860,130.80 and 615,878.80 is: 860,130.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,878.80 : 860,130.80 = 615,878.80 : x
  2. Step 2: Convert to fraction form
    615,878.80/860,130.80 = 615,878.80/x
  3. Step 3: Cross multiply
    615,878.80x = 860,130.80 × 615,878.80
  4. Step 4: Simplify right side
    615,878.80x = 529,736,324,947.04
  5. Step 5: Solve for x
    x = 529,736,324,947.04/615,878.80
  6. Step 6: Final answer
    x = 860,130.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.