Home / 1,376,085.60-2,064,128.40-1,287,512.10

Finding the Fourth Proportional to 1,376,085.60, 2,064,128.40 and 1,287,512.10

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Solution

The fourth proportional to 1,376,085.60, 2,064,128.40 and 1,287,512.10 is: 1,931,268.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376,085.60 : 2,064,128.40 = 1,287,512.10 : x
  2. Step 2: Convert to fraction form
    1,376,085.60/2,064,128.40 = 1,287,512.10/x
  3. Step 3: Cross multiply
    1,376,085.60x = 2,064,128.40 × 1,287,512.10
  4. Step 4: Simplify right side
    1,376,085.60x = 2,657,590,290,953.64
  5. Step 5: Solve for x
    x = 2,657,590,290,953.64/1,376,085.60
  6. Step 6: Final answer
    x = 1,931,268.15

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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.