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Finding the Fourth Proportional to 615,864.80, 860,111.20 and 615,864.80

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Solution

The fourth proportional to 615,864.80, 860,111.20 and 615,864.80 is: 860,111.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,864.80 : 860,111.20 = 615,864.80 : x
  2. Step 2: Convert to fraction form
    615,864.80/860,111.20 = 615,864.80/x
  3. Step 3: Cross multiply
    615,864.80x = 860,111.20 × 615,864.80
  4. Step 4: Simplify right side
    615,864.80x = 529,712,212,165.76
  5. Step 5: Solve for x
    x = 529,712,212,165.76/615,864.80
  6. Step 6: Final answer
    x = 860,111.20

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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.