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Finding the Fourth Proportional to 778,885.80, 1,168,328.70 and 671,980.20

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Solution

The fourth proportional to 778,885.80, 1,168,328.70 and 671,980.20 is: 1,007,970.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,885.80 : 1,168,328.70 = 671,980.20 : x
  2. Step 2: Convert to fraction form
    778,885.80/1,168,328.70 = 671,980.20/x
  3. Step 3: Cross multiply
    778,885.80x = 1,168,328.70 × 671,980.20
  4. Step 4: Simplify right side
    778,885.80x = 785,093,753,491.74
  5. Step 5: Solve for x
    x = 785,093,753,491.74/778,885.80
  6. Step 6: Final answer
    x = 1,007,970.30

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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.