Home / 831,985.80-1,148,140.20-469,406.40

Finding the Fourth Proportional to 831,985.80, 1,148,140.20 and 469,406.40

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Solution

The fourth proportional to 831,985.80, 1,148,140.20 and 469,406.40 is: 647,780.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,985.80 : 1,148,140.20 = 469,406.40 : x
  2. Step 2: Convert to fraction form
    831,985.80/1,148,140.20 = 469,406.40/x
  3. Step 3: Cross multiply
    831,985.80x = 1,148,140.20 × 469,406.40
  4. Step 4: Simplify right side
    831,985.80x = 538,944,357,977.28
  5. Step 5: Solve for x
    x = 538,944,357,977.28/831,985.80
  6. Step 6: Final answer
    x = 647,780.72

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.