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Finding the Fourth Proportional to 768,384.40, 1,077,312.80 and 768,384.40

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Solution

The fourth proportional to 768,384.40, 1,077,312.80 and 768,384.40 is: 1,077,312.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,384.40 : 1,077,312.80 = 768,384.40 : x
  2. Step 2: Convert to fraction form
    768,384.40/1,077,312.80 = 768,384.40/x
  3. Step 3: Cross multiply
    768,384.40x = 1,077,312.80 × 768,384.40
  4. Step 4: Simplify right side
    768,384.40x = 827,790,349,440.32
  5. Step 5: Solve for x
    x = 827,790,349,440.32/768,384.40
  6. Step 6: Final answer
    x = 1,077,312.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.