Home / 430,129.20-645,193.80-289,124.40

Finding the Fourth Proportional to 430,129.20, 645,193.80 and 289,124.40

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Solution

The fourth proportional to 430,129.20, 645,193.80 and 289,124.40 is: 433,686.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,129.20 : 645,193.80 = 289,124.40 : x
  2. Step 2: Convert to fraction form
    430,129.20/645,193.80 = 289,124.40/x
  3. Step 3: Cross multiply
    430,129.20x = 645,193.80 × 289,124.40
  4. Step 4: Simplify right side
    430,129.20x = 186,541,270,308.72
  5. Step 5: Solve for x
    x = 186,541,270,308.72/430,129.20
  6. Step 6: Final answer
    x = 433,686.60

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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.