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Finding the Fourth Proportional to 1,429,681.63, 1,973,403.51 and 920,384

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Solution

The fourth proportional to 1,429,681.63, 1,973,403.51 and 920,384 is: 1,270,415.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429,681.63 : 1,973,403.51 = 920,384 : x
  2. Step 2: Convert to fraction form
    1,429,681.63/1,973,403.51 = 920,384/x
  3. Step 3: Cross multiply
    1,429,681.63x = 1,973,403.51 × 920,384
  4. Step 4: Simplify right side
    1,429,681.63x = 1,816,289,016,147.84
  5. Step 5: Solve for x
    x = 1,816,289,016,147.84/1,429,681.63
  6. Step 6: Final answer
    x = 1,270,415.02

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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.