Home / 851,235.80-1,276,205.70-430,813.40

Finding the Fourth Proportional to 851,235.80, 1,276,205.70 and 430,813.40

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Solution

The fourth proportional to 851,235.80, 1,276,205.70 and 430,813.40 is: 645,892.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,235.80 : 1,276,205.70 = 430,813.40 : x
  2. Step 2: Convert to fraction form
    851,235.80/1,276,205.70 = 430,813.40/x
  3. Step 3: Cross multiply
    851,235.80x = 1,276,205.70 × 430,813.40
  4. Step 4: Simplify right side
    851,235.80x = 549,806,516,716.38
  5. Step 5: Solve for x
    x = 549,806,516,716.38/851,235.80
  6. Step 6: Final answer
    x = 645,892.14

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1.5x scale

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.