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Finding the Fourth Proportional to 561,639.60, 842,459.40 and 553,345.20

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Solution

The fourth proportional to 561,639.60, 842,459.40 and 553,345.20 is: 830,017.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,639.60 : 842,459.40 = 553,345.20 : x
  2. Step 2: Convert to fraction form
    561,639.60/842,459.40 = 553,345.20/x
  3. Step 3: Cross multiply
    561,639.60x = 842,459.40 × 553,345.20
  4. Step 4: Simplify right side
    561,639.60x = 466,170,865,184.88
  5. Step 5: Solve for x
    x = 466,170,865,184.88/561,639.60
  6. Step 6: Final answer
    x = 830,017.80

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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.