Home / 287,587.85-431,382.24-287,172.32

Finding the Fourth Proportional to 287,587.85, 431,382.24 and 287,172.32

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Solution

The fourth proportional to 287,587.85, 431,382.24 and 287,172.32 is: 430,758.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,587.85 : 431,382.24 = 287,172.32 : x
  2. Step 2: Convert to fraction form
    287,587.85/431,382.24 = 287,172.32/x
  3. Step 3: Cross multiply
    287,587.85x = 431,382.24 × 287,172.32
  4. Step 4: Simplify right side
    287,587.85x = 123,881,036,510.69
  5. Step 5: Solve for x
    x = 123,881,036,510.69/287,587.85
  6. Step 6: Final answer
    x = 430,758.94

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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.