Home / 779,990-1,075,345.28-619,376.72

Finding the Fourth Proportional to 779,990, 1,075,345.28 and 619,376.72

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Solution

The fourth proportional to 779,990, 1,075,345.28 and 619,376.72 is: 853,913.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    779,990 : 1,075,345.28 = 619,376.72 : x
  2. Step 2: Convert to fraction form
    779,990/1,075,345.28 = 619,376.72/x
  3. Step 3: Cross multiply
    779,990x = 1,075,345.28 × 619,376.72
  4. Step 4: Simplify right side
    779,990x = 666,043,832,393.88
  5. Step 5: Solve for x
    x = 666,043,832,393.88/779,990
  6. Step 6: Final answer
    x = 853,913.30

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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.