Home / 917,643.80-1,376,465.70-286,621.40

Finding the Fourth Proportional to 917,643.80, 1,376,465.70 and 286,621.40

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Solution

The fourth proportional to 917,643.80, 1,376,465.70 and 286,621.40 is: 429,932.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,643.80 : 1,376,465.70 = 286,621.40 : x
  2. Step 2: Convert to fraction form
    917,643.80/1,376,465.70 = 286,621.40/x
  3. Step 3: Cross multiply
    917,643.80x = 1,376,465.70 × 286,621.40
  4. Step 4: Simplify right side
    917,643.80x = 394,524,525,985.98
  5. Step 5: Solve for x
    x = 394,524,525,985.98/917,643.80
  6. Step 6: Final answer
    x = 429,932.10

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Similar ratio
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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.