Home / 661,700.12-912,986.98-389,746.67

Finding the Fourth Proportional to 661,700.12, 912,986.98 and 389,746.67

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Solution

The fourth proportional to 661,700.12, 912,986.98 and 389,746.67 is: 537,756.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,700.12 : 912,986.98 = 389,746.67 : x
  2. Step 2: Convert to fraction form
    661,700.12/912,986.98 = 389,746.67/x
  3. Step 3: Cross multiply
    661,700.12x = 912,986.98 × 389,746.67
  4. Step 4: Simplify right side
    661,700.12x = 355,833,629,669.06
  5. Step 5: Solve for x
    x = 355,833,629,669.06/661,700.12
  6. Step 6: Final answer
    x = 537,756.64

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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.