Home / 864,421.80-1,296,620.55-391,106.40

Finding the Fourth Proportional to 864,421.80, 1,296,620.55 and 391,106.40

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Solution

The fourth proportional to 864,421.80, 1,296,620.55 and 391,106.40 is: 586,654.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,421.80 : 1,296,620.55 = 391,106.40 : x
  2. Step 2: Convert to fraction form
    864,421.80/1,296,620.55 = 391,106.40/x
  3. Step 3: Cross multiply
    864,421.80x = 1,296,620.55 × 391,106.40
  4. Step 4: Simplify right side
    864,421.80x = 507,116,595,476.52
  5. Step 5: Solve for x
    x = 507,116,595,476.52/864,421.80
  6. Step 6: Final answer
    x = 586,654.10

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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.