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Finding the Fourth Proportional to 660,005.30, 988,333.34 and 553,108.15

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Solution

The fourth proportional to 660,005.30, 988,333.34 and 553,108.15 is: 828,258.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,005.30 : 988,333.34 = 553,108.15 : x
  2. Step 2: Convert to fraction form
    660,005.30/988,333.34 = 553,108.15/x
  3. Step 3: Cross multiply
    660,005.30x = 988,333.34 × 553,108.15
  4. Step 4: Simplify right side
    660,005.30x = 546,655,223,740.60
  5. Step 5: Solve for x
    x = 546,655,223,740.60/660,005.30
  6. Step 6: Final answer
    x = 828,258.84

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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.